diff --git a/lib/libc/mingw/math/arm-common/sincosl.c b/lib/libc/mingw/math/arm-common/sincosl.c
deleted file mode 100644
index 8caeaec5a9..0000000000
--- a/lib/libc/mingw/math/arm-common/sincosl.c
+++ /dev/null
@@ -1,13 +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>
-
-void sincosl(long double x, long double *s, long double *c)
-{
-    *s = sinl(x);
-    *c = cosl(x);
-}
diff --git a/lib/libc/musl/src/math/sincosl.c b/lib/libc/musl/src/math/sincosl.c
deleted file mode 100644
index d3ac1c4c8c..0000000000
--- a/lib/libc/musl/src/math/sincosl.c
+++ /dev/null
@@ -1,60 +0,0 @@
-#define _GNU_SOURCE
-#include "libm.h"
-
-#if LDBL_MANT_DIG == 53 && LDBL_MAX_EXP == 1024
-void sincosl(long double x, long double *sin, long double *cos)
-{
-	double sind, cosd;
-	sincos(x, &sind, &cosd);
-	*sin = sind;
-	*cos = cosd;
-}
-#elif (LDBL_MANT_DIG == 64 || LDBL_MANT_DIG == 113) && LDBL_MAX_EXP == 16384
-void sincosl(long double x, long double *sin, long double *cos)
-{
-	union ldshape u = {x};
-	unsigned n;
-	long double y[2], s, c;
-
-	u.i.se &= 0x7fff;
-	if (u.i.se == 0x7fff) {
-		*sin = *cos = x - x;
-		return;
-	}
-	if (u.f < M_PI_4) {
-		if (u.i.se < 0x3fff - LDBL_MANT_DIG) {
-			/* raise underflow if subnormal */
-			if (u.i.se == 0) FORCE_EVAL(x*0x1p-120f);
-			*sin = x;
-			/* raise inexact if x!=0 */
-			*cos = 1.0 + x;
-			return;
-		}
-		*sin = __sinl(x, 0, 0);
-		*cos = __cosl(x, 0);
-		return;
-	}
-	n = __rem_pio2l(x, y);
-	s = __sinl(y[0], y[1], 1);
-	c = __cosl(y[0], y[1]);
-	switch (n & 3) {
-	case 0:
-		*sin = s;
-		*cos = c;
-		break;
-	case 1:
-		*sin = c;
-		*cos = -s;
-		break;
-	case 2:
-		*sin = -s;
-		*cos = -c;
-		break;
-	case 3:
-	default:
-		*sin = -c;
-		*cos = s;
-		break;
-	}
-}
-#endif
diff --git a/src/libs/mingw.zig b/src/libs/mingw.zig
index 07e67ea468..99fad69a06 100644
--- a/src/libs/mingw.zig
+++ b/src/libs/mingw.zig
@@ -987,7 +987,6 @@ const mingw32_x86_32_src = [_][]const u8{
 const mingw32_arm_src = [_][]const u8{
     // mingwex
     "math" ++ path.sep_str ++ "arm-common" ++ path.sep_str ++ "ldexpl.c",
-    "math" ++ path.sep_str ++ "arm-common" ++ path.sep_str ++ "sincosl.c",
 };
 
 const mingw32_arm32_src = [_][]const u8{
diff --git a/src/libs/musl.zig b/src/libs/musl.zig
index e206d86369..649bef26a3 100644
--- a/src/libs/musl.zig
+++ b/src/libs/musl.zig
@@ -992,7 +992,6 @@ const src_files = [_][]const u8{
     "musl/src/math/significand.c",
     "musl/src/math/significandf.c",
     "musl/src/math/__sin.c",
-    "musl/src/math/sincosl.c",
     "musl/src/math/__sindf.c",
     "musl/src/math/sinh.c",
     "musl/src/math/sinhf.c",
diff --git a/src/libs/wasi_libc.zig b/src/libs/wasi_libc.zig
index 12edf9b783..953c3cbff5 100644
--- a/src/libs/wasi_libc.zig
+++ b/src/libs/wasi_libc.zig
@@ -785,7 +785,6 @@ const libc_top_half_src_files = [_][]const u8{
     "musl/src/math/significand.c",
     "musl/src/math/significandf.c",
     "musl/src/math/__sin.c",
-    "musl/src/math/sincosl.c",
     "musl/src/math/__sindf.c",
     "musl/src/math/sinhl.c",
     "musl/src/math/__sinl.c",