diff --git a/h_malloc.c b/h_malloc.c
index d855e0e..998de6f 100644
--- a/h_malloc.c
+++ b/h_malloc.c
@@ -1156,7 +1156,7 @@ COLD static void init_slow_path(void) {
     mutex_unlock(&lock);
 
     // may allocate, so wait until the allocator is initialized to avoid deadlocking
-    if (atfork(full_lock, full_unlock, post_fork_child)) {
+    if (pthread_atfork(full_lock, full_unlock, post_fork_child)) {
         fatal_error("pthread_atfork failed");
     }
 }
diff --git a/util.h b/util.h
index 5f2274a..3e07d8c 100644
--- a/util.h
+++ b/util.h
@@ -38,19 +38,6 @@ typedef uint32_t u32;
 typedef uint64_t u64;
 typedef unsigned __int128 u128;
 
-// use __register_atfork directly to avoid linking with libpthread for glibc < 2.28
-#ifdef __GLIBC__
-#if !__GLIBC_PREREQ(2, 28)
-extern void *__dso_handle;
-extern int __register_atfork(void (*)(void), void (*)(void), void (*)(void), void *);
-#define atfork(prepare, parent, child) __register_atfork(prepare, parent, child, __dso_handle)
-#endif
-#endif
-
-#ifndef atfork
-#define atfork pthread_atfork
-#endif
-
 #if CONFIG_SEAL_METADATA
 
 #ifdef __GLIBC__