diff --git a/lib/std/os/linux/csky.zig b/lib/std/os/linux/csky.zig
index 9a0e854979d79614c8b40235d39e5e03f873bb04..4d456b08f210dce3f61da784333f067f341b8445 100644
--- a/lib/std/os/linux/csky.zig
+++ b/lib/std/os/linux/csky.zig
@@ -120,7 +120,7 @@ pub fn clone() callconv(.naked) u32 {
         \\ mov t0, r4
         \\ mov t1, r7
         \\
-        \\ andi r1, r1, -8
+        \\ andni r1, r1, 7
         \\
         \\ subi r1, 8
         \\ stw r0, (r1, 0)
diff --git a/lib/std/start.zig b/lib/std/start.zig
index 9e8ea47877453d7e7b079b2cbddb430c1e8a67af..92e0df4ed4b938f64a01a2c9cd51494ae8271447 100644
--- a/lib/std/start.zig
+++ b/lib/std/start.zig
@@ -282,7 +282,7 @@ fn _start() callconv(.naked) noreturn {
             \\ movi r8, 0
             \\ movi lr, 0
             \\ mov a0, sp
-            \\ andi sp, sp, -8
+            \\ andni sp, sp, 7
             \\ lrw t1, %[posixCallMainAndExit]@GOTOFF
             \\ addu t1, gb
             \\ jmp t1