diff --git a/src/snmalloc/global/libc.h b/src/snmalloc/global/libc.h
index 700fd3901..2a6db38a3 100644
--- a/src/snmalloc/global/libc.h
+++ b/src/snmalloc/global/libc.h
@@ -145,8 +145,7 @@ namespace snmalloc::libc
 
   inline void* memalign(size_t alignment, size_t size)
   {
-    if (SNMALLOC_UNLIKELY(
-          alignment < sizeof(uintptr_t) || !bits::is_pow2(alignment)))
+    if (SNMALLOC_UNLIKELY(alignment == 0 || !bits::is_pow2(alignment)))
     {
       return set_error(EINVAL);
     }