diff --git a/lib/c/math.zig b/lib/c/math.zig
index 8282b1ff0ab772d40b160f7dd2897910456c1504..3e4aa662d09ccde4b42ccdb48dfc08e19edd0154 100644
--- a/lib/c/math.zig
+++ b/lib/c/math.zig
@@ -32,6 +32,12 @@ comptime {
         @export(&nanf, .{ .name = "nanf", .linkage = common.linkage, .visibility = common.visibility });
         @export(&nanl, .{ .name = "nanl", .linkage = common.linkage, .visibility = common.visibility });
     }
+
+    if (builtin.target.isMuslLibC()) {
+        @export(&copysignf, .{ .name = "copysignf", .linkage = common.linkage, .visibility = common.visibility });
+        @export(&copysign, .{ .name = "copysign", .linkage = common.linkage, .visibility = common.visibility });
+    }
+    @export(&copysignl, .{ .name = "copysignl", .linkage = common.linkage, .visibility = common.visibility });
 }
 
 fn isnan(x: f64) callconv(.c) c_int {
@@ -57,3 +63,15 @@ fn nanf(_: [*:0]const c_char) callconv(.c) f32 {
 fn nanl(_: [*:0]const c_char) callconv(.c) c_longdouble {
     return std.math.nan(c_longdouble);
 }
+
+fn copysignf(x: f32, y: f32) callconv(.c) f32 {
+    return std.math.copysign(x, y);
+}
+
+fn copysign(x: f64, y: f64) callconv(.c) f64 {
+    return std.math.copysign(x, y);
+}
+
+fn copysignl(x: c_longdouble, y: c_longdouble) callconv(.c) c_longdouble {
+    return std.math.copysign(x, y);
+}
diff --git a/lib/libc/mingw/math/copysign.c b/lib/libc/mingw/math/copysign.c
deleted file mode 100644
index c3fe76f0d39b05628dfe8933a2b555d9f4e63544..0000000000000000000000000000000000000000
--- a/lib/libc/mingw/math/copysign.c
+++ /dev/null
@@ -1,21 +0,0 @@
-/**
- * This file has no copyright assigned and is placed in the Public Domain.
- * This file is part of the mingw-w64 runtime package.
- * No warranty is given; refer to the file DISCLAIMER.PD within this package.
- */
-#include <math.h>
-
-typedef union U
-{
-  unsigned int u[2];
-  double d;
-} U;
-
-double copysign(double x, double y)
-{
-  U h,j;
-  h.d = x;
-  j.d = y;
-  h.u[1] = (h.u[1] & 0x7fffffff) | (j.u[1] & 0x80000000);
-  return h.d;
-}
diff --git a/lib/libc/mingw/math/copysignf.c b/lib/libc/mingw/math/copysignf.c
deleted file mode 100644
index 0fba92bc75989f8c1363388169ab6bd26f62465a..0000000000000000000000000000000000000000
--- a/lib/libc/mingw/math/copysignf.c
+++ /dev/null
@@ -1,19 +0,0 @@
-/**
- * This file has no copyright assigned and is placed in the Public Domain.
- * This file is part of the mingw-w64 runtime package.
- * No warranty is given; refer to the file DISCLAIMER.PD within this package.
- */
-#include <math.h>
-
-typedef union ui_f {
-	float f;
-	unsigned int ui;
-} ui_f;
-
-float copysignf(float aX, float aY)
-{
-  ui_f x,y;
-  x.f=aX; y.f=aY;
-  x.ui= (x.ui & 0x7fffffff) | (y.ui & 0x80000000);
-  return x.f;
-}
diff --git a/lib/libc/mingw/math/x86/copysignl.S b/lib/libc/mingw/math/x86/copysignl.S
deleted file mode 100644
index 6f98c7a5d5ad136ecce98daa29331b2b3862bbe5..0000000000000000000000000000000000000000
--- a/lib/libc/mingw/math/x86/copysignl.S
+++ /dev/null
@@ -1,44 +0,0 @@
-/**
- * This file has no copyright assigned and is placed in the Public Domain.
- * This file is part of the mingw-w64 runtime package.
- * No warranty is given; refer to the file DISCLAIMER.PD within this package.
- */
-/*
- * Written by J.T. Conklin <jtc@netbsd.org>.
- * Changes for long double by Ulrich Drepper <drepper@cygnus.com>
- * Public domain.
- */
-#include <_mingw_mac.h>
-
-	.file	"copysignl.S"
-	.text
-#ifdef __x86_64__
-	.align 8
-#else
-	.align 4
-#endif
-
-	.globl __MINGW_USYMBOL(copysignl)
-	.def	__MINGW_USYMBOL(copysignl);	.scl	2;	.type	32;	.endef
-__MINGW_USYMBOL(copysignl):
-#if defined(_AMD64_) || defined(__x86_64__)
-	movq	(%rdx), %rax
-	movq	%rax, (%rcx)
-	movq	8(%rdx), %rax
-	movq	8(%r8), %rdx
-	andq	$0x7fff, %rax
-	andq	$0x8000, %rdx
-	orq	%rdx, %rax
-	movq	%rax, 8(%rcx)
-	movq	%rcx, %rax
-	ret
-#elif defined(_X86_) || defined(__i386__)
-	movl	24(%esp),%edx
-	movl	12(%esp),%eax
-	andl	$0x8000,%edx
-	andl	$0x7fff,%eax
-	orl	%edx,%eax
-	movl	%eax,12(%esp)
-	fldt	4(%esp)
-	ret
-#endif
diff --git a/lib/libc/musl/src/math/copysign.c b/lib/libc/musl/src/math/copysign.c
deleted file mode 100644
index b09331b6876e74ebb5c12bdc9a0ee183ee5cc136..0000000000000000000000000000000000000000
--- a/lib/libc/musl/src/math/copysign.c
+++ /dev/null
@@ -1,8 +0,0 @@
-#include "libm.h"
-
-double copysign(double x, double y) {
-	union {double f; uint64_t i;} ux={x}, uy={y};
-	ux.i &= -1ULL/2;
-	ux.i |= uy.i & 1ULL<<63;
-	return ux.f;
-}
diff --git a/lib/libc/musl/src/math/copysignf.c b/lib/libc/musl/src/math/copysignf.c
deleted file mode 100644
index 0af6ae9b2155da70412f7406e67ab968218d2265..0000000000000000000000000000000000000000
--- a/lib/libc/musl/src/math/copysignf.c
+++ /dev/null
@@ -1,10 +0,0 @@
-#include <math.h>
-#include <stdint.h>
-
-float copysignf(float x, float y)
-{
-	union {float f; uint32_t i;} ux={x}, uy={y};
-	ux.i &= 0x7fffffff;
-	ux.i |= uy.i & 0x80000000;
-	return ux.f;
-}
diff --git a/lib/libc/musl/src/math/copysignl.c b/lib/libc/musl/src/math/copysignl.c
deleted file mode 100644
index 9dd933cfa9c55214df9392e9a90dcc83a2dd0c8f..0000000000000000000000000000000000000000
--- a/lib/libc/musl/src/math/copysignl.c
+++ /dev/null
@@ -1,16 +0,0 @@
-#include "libm.h"
-
-#if LDBL_MANT_DIG == 53 && LDBL_MAX_EXP == 1024
-long double copysignl(long double x, long double y)
-{
-	return copysign(x, y);
-}
-#elif (LDBL_MANT_DIG == 64 || LDBL_MANT_DIG == 113) && LDBL_MAX_EXP == 16384
-long double copysignl(long double x, long double y)
-{
-	union ldshape ux = {x}, uy = {y};
-	ux.i.se &= 0x7fff;
-	ux.i.se |= uy.i.se & 0x8000;
-	return ux.f;
-}
-#endif
diff --git a/lib/libc/musl/src/math/riscv32/copysign.c b/lib/libc/musl/src/math/riscv32/copysign.c
deleted file mode 100644
index c7854178f053244241cee25ef7a3a122d494fca7..0000000000000000000000000000000000000000
--- a/lib/libc/musl/src/math/riscv32/copysign.c
+++ /dev/null
@@ -1,15 +0,0 @@
-#include <math.h>
-
-#if __riscv_flen >= 64
-
-double copysign(double x, double y)
-{
-	__asm__ ("fsgnj.d %0, %1, %2" : "=f"(x) : "f"(x), "f"(y));
-	return x;
-}
-
-#else
-
-#include "../copysign.c"
-
-#endif
diff --git a/lib/libc/musl/src/math/riscv32/copysignf.c b/lib/libc/musl/src/math/riscv32/copysignf.c
deleted file mode 100644
index a125611ace4422f9ffefbea87432497efa74d268..0000000000000000000000000000000000000000
--- a/lib/libc/musl/src/math/riscv32/copysignf.c
+++ /dev/null
@@ -1,15 +0,0 @@
-#include <math.h>
-
-#if __riscv_flen >= 32
-
-float copysignf(float x, float y)
-{
-	__asm__ ("fsgnj.s %0, %1, %2" : "=f"(x) : "f"(x), "f"(y));
-	return x;
-}
-
-#else
-
-#include "../copysignf.c"
-
-#endif
diff --git a/lib/libc/musl/src/math/riscv64/copysign.c b/lib/libc/musl/src/math/riscv64/copysign.c
deleted file mode 100644
index c7854178f053244241cee25ef7a3a122d494fca7..0000000000000000000000000000000000000000
--- a/lib/libc/musl/src/math/riscv64/copysign.c
+++ /dev/null
@@ -1,15 +0,0 @@
-#include <math.h>
-
-#if __riscv_flen >= 64
-
-double copysign(double x, double y)
-{
-	__asm__ ("fsgnj.d %0, %1, %2" : "=f"(x) : "f"(x), "f"(y));
-	return x;
-}
-
-#else
-
-#include "../copysign.c"
-
-#endif
diff --git a/lib/libc/musl/src/math/riscv64/copysignf.c b/lib/libc/musl/src/math/riscv64/copysignf.c
deleted file mode 100644
index a125611ace4422f9ffefbea87432497efa74d268..0000000000000000000000000000000000000000
--- a/lib/libc/musl/src/math/riscv64/copysignf.c
+++ /dev/null
@@ -1,15 +0,0 @@
-#include <math.h>
-
-#if __riscv_flen >= 32
-
-float copysignf(float x, float y)
-{
-	__asm__ ("fsgnj.s %0, %1, %2" : "=f"(x) : "f"(x), "f"(y));
-	return x;
-}
-
-#else
-
-#include "../copysignf.c"
-
-#endif
diff --git a/src/libs/mingw.zig b/src/libs/mingw.zig
index a29b424d27663007646f054ea4f7267ac3f3e42b..ded4db0c3e8f2690479f406794de59493ec92eb5 100644
--- a/src/libs/mingw.zig
+++ b/src/libs/mingw.zig
@@ -957,7 +957,6 @@ const mingw32_x86_src = [_][]const u8{
     "math" ++ path.sep_str ++ "x86" ++ path.sep_str ++ "atan2l.c",
     "math" ++ path.sep_str ++ "x86" ++ path.sep_str ++ "atanhl.c",
     "math" ++ path.sep_str ++ "x86" ++ path.sep_str ++ "atanl.c",
-    "math" ++ path.sep_str ++ "x86" ++ path.sep_str ++ "copysignl.S",
     "math" ++ path.sep_str ++ "x86" ++ path.sep_str ++ "cosl.c",
     "math" ++ path.sep_str ++ "x86" ++ path.sep_str ++ "cosl_internal.S",
     "math" ++ path.sep_str ++ "x86" ++ path.sep_str ++ "cossinl.c",
diff --git a/src/libs/musl.zig b/src/libs/musl.zig
index 8fc3d608d5032e324543ca86ead989d1fa99fbeb..3393cecbb041159e92a73b7aeb173d3619a1f886 100644
--- a/src/libs/musl.zig
+++ b/src/libs/musl.zig
@@ -856,9 +856,6 @@ const src_files = [_][]const u8{
     "musl/src/math/cbrt.c",
     "musl/src/math/cbrtf.c",
     "musl/src/math/cbrtl.c",
-    "musl/src/math/copysign.c",
-    "musl/src/math/copysignf.c",
-    "musl/src/math/copysignl.c",
     "musl/src/math/__cos.c",
     "musl/src/math/__cosdf.c",
     "musl/src/math/cosh.c",
@@ -1048,14 +1045,10 @@ const src_files = [_][]const u8{
     "musl/src/math/rint.c",
     "musl/src/math/rintf.c",
     "musl/src/math/rintl.c",
-    "musl/src/math/riscv32/copysign.c",
-    "musl/src/math/riscv32/copysignf.c",
     "musl/src/math/riscv32/fma.c",
     "musl/src/math/riscv32/fmaf.c",
     "musl/src/math/riscv32/sqrt.c",
     "musl/src/math/riscv32/sqrtf.c",
-    "musl/src/math/riscv64/copysign.c",
-    "musl/src/math/riscv64/copysignf.c",
     "musl/src/math/riscv64/fma.c",
     "musl/src/math/riscv64/fmaf.c",
     "musl/src/math/riscv64/sqrt.c",
diff --git a/src/libs/wasi_libc.zig b/src/libs/wasi_libc.zig
index b523d8f008051441703ca9ae33e3545b06bbd007..1d002e335313b65c4c40c119ecd2a1abb46d49d9 100644
--- a/src/libs/wasi_libc.zig
+++ b/src/libs/wasi_libc.zig
@@ -710,7 +710,6 @@ const libc_top_half_src_files = [_][]const u8{
     "musl/src/math/cbrt.c",
     "musl/src/math/cbrtf.c",
     "musl/src/math/cbrtl.c",
-    "musl/src/math/copysignl.c",
     "musl/src/math/__cos.c",
     "musl/src/math/__cosdf.c",
     "musl/src/math/coshl.c",