diff --git a/include/mimalloc-internal.h b/include/mimalloc-internal.h
index 8395f7ef..208e72f8 100644
--- a/include/mimalloc-internal.h
+++ b/include/mimalloc-internal.h
@@ -242,12 +242,6 @@ static inline uintptr_t _mi_align_up(uintptr_t sz, size_t alignment) {
   }
 }
 
-// Is aligned?
-static inline bool _mi_is_aligned(void* p, size_t alignment) {
-  mi_assert_internal(alignment != 0);
-  return (((uintptr_t)p % alignment) == 0);
-}
-
 // Divide upwards: `s <= _mi_divide_up(s,d)*d < s+d`.
 static inline uintptr_t _mi_divide_up(uintptr_t size, size_t divider) {
   mi_assert_internal(divider != 0);