diff --git a/lib/c/wchar.zig b/lib/c/wchar.zig
index 24aca6b0c869d4900cd4724160c760a8bcfc98cb..a4d7e427a2e20a4b9b6d5aef2c45372a65f816be 100644
--- a/lib/c/wchar.zig
+++ b/lib/c/wchar.zig
@@ -14,7 +14,6 @@ comptime {
         symbol(&wmemcpy, "wmemcpy");
         symbol(&wmemmove, "wmemmove");
         symbol(&wmemset, "wmemset");
-        symbol(&wcslen, "wcslen");
         symbol(&wcsnlen, "wcsnlen");
         symbol(&wcscmp, "wcscmp");
         symbol(&wcsncmp, "wcsncmp");
@@ -78,10 +77,6 @@ fn wmemset(dest: [*]wchar_t, elem: wchar_t, len: usize) callconv(.c) [*]wchar_t
     return dest;
 }
 
-fn wcslen(str: [*:0]const wchar_t) callconv(.c) usize {
-    return wcsnlen(str, std.math.maxInt(usize));
-}
-
 fn wcsnlen(str: [*:0]const wchar_t, max: usize) callconv(.c) usize {
     return std.mem.findScalar(wchar_t, str[0..max], 0) orelse max;
 }
@@ -193,7 +188,7 @@ fn wcswcs(noalias haystack: [*:0]const wchar_t, noalias needle: [*:0]const wchar
 }
 
 fn wcsdup(str: [*:0]const wchar_t) callconv(.c) ?[*:0]wchar_t {
-    const len = wcslen(str);
+    const len = c.wcslen(str);
     const size = (len + 1) * @sizeOf(wchar_t);
     const d_opaque = c.malloc(size) orelse return null;
     const d: [*]wchar_t = @ptrCast(@alignCast(d_opaque));
diff --git a/lib/compiler_rt.zig b/lib/compiler_rt.zig
index e5cffd9d7e50b7cd35dbc94c49ead55d663fb873..c10141d6bac144d3b2ad4bef17298c963769f7b3 100644
--- a/lib/compiler_rt.zig
+++ b/lib/compiler_rt.zig
@@ -174,6 +174,7 @@ comptime {
         symbol(&bcmp, "bcmp");
         _ = @import("compiler_rt/ssp.zig");
         symbol(&strlen, "strlen");
+        symbol(&wcslen, "wcslen");
     }
 
     // Temporarily used for uefi until https://github.com/ziglang/zig/issues/21630 is addressed.
@@ -188,6 +189,10 @@ fn strlen(s: [*:0]const c_char) callconv(.c) usize {
     return std.mem.len(s);
 }
 
+fn wcslen(s: [*:0]const std.c.wchar_t) callconv(.c) usize {
+    return std.mem.len(s);
+}
+
 fn memcmp(vl: [*]const u8, vr: [*]const u8, n: usize) callconv(.c) c_int {
     var i: usize = 0;
     while (i < n) : (i += 1) {
diff --git a/lib/std/c.zig b/lib/std/c.zig
index e3625edb869186614eb961174748f5fcab77f5b4..a4c5aa9e5ea5d6a46332b34cc4759497b48c637f 100644
--- a/lib/std/c.zig
+++ b/lib/std/c.zig
@@ -11214,6 +11214,8 @@ pub extern "c" fn div(a: c_int, b: c_int) div_t;
 pub extern "c" fn ldiv(a: c_long, b: c_long) ldiv_t;
 pub extern "c" fn lldiv(a: c_longlong, b: c_longlong) lldiv_t;
 
+pub extern "c" fn wcslen(s: [*:0]const wchar_t) usize;
+
 pub extern "c" fn atoi(str: [*:0]const c_char) c_int;
 pub extern "c" fn atol(str: [*:0]const c_char) c_long;
 pub extern "c" fn atoll(str: [*:0]const c_char) c_longlong;