diff --git a/src/runtime/testdata/testprogcgo/bindm.c b/src/runtime/testdata/testprogcgo/bindm.c
deleted file mode 100644
index 815d8a75f2..0000000000
--- a/src/runtime/testdata/testprogcgo/bindm.c
+++ /dev/null
@@ -1,34 +0,0 @@
-// Copyright 2023 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-//go:build !plan9 && !windows
-
-#include <stdint.h>
-#include <pthread.h>
-#include <unistd.h>
-#include "_cgo_export.h"
-
-#define CTHREADS 2
-#define CHECKCALLS 100
-
-static void* checkBindMThread(void* thread) {
-	int i;
-	for (i = 0; i < CHECKCALLS; i++) {
-		GoCheckBindM((uintptr_t)thread);
-		usleep(1);
-	}
-	return NULL;
-}
-
-void CheckBindM() {
-	int i;
-	pthread_t s[CTHREADS];
-
-	for (i = 0; i < CTHREADS; i++) {
-		pthread_create(&s[i], NULL, checkBindMThread, &s[i]);
-	}
-	for (i = 0; i < CTHREADS; i++) {
-		pthread_join(s[i], NULL);
-	}
-}
diff --git a/src/runtime/testdata/testprogcgo/bindm.go b/src/runtime/testdata/testprogcgo/bindm.go
index c2003c2093..ed2c6a7eea 100644
--- a/src/runtime/testdata/testprogcgo/bindm.go
+++ b/src/runtime/testdata/testprogcgo/bindm.go
@@ -10,7 +10,35 @@
 package main
 
 /*
-extern void CheckBindM();
+#include <stdint.h>
+#include <pthread.h>
+#include <unistd.h>
+
+extern void GoCheckBindM();
+
+#define CTHREADS 2
+#define CHECKCALLS 100
+
+static void* checkBindMThread(void* thread) {
+	int i;
+	for (i = 0; i < CHECKCALLS; i++) {
+		GoCheckBindM((uintptr_t)thread);
+		usleep(1);
+	}
+	return NULL;
+}
+
+static void CheckBindM() {
+	int i;
+	pthread_t s[CTHREADS];
+
+	for (i = 0; i < CTHREADS; i++) {
+		pthread_create(&s[i], NULL, checkBindMThread, &s[i]);
+	}
+	for (i = 0; i < CTHREADS; i++) {
+		pthread_join(s[i], NULL);
+	}
+}
 */
 import "C"