diff --git a/src/include/lib/simplehash.h b/src/include/lib/simplehash.h
index ff50633..6e85de8 100644
--- a/src/include/lib/simplehash.h
+++ b/src/include/lib/simplehash.h
@@ -280,6 +280,10 @@ SH_ENTRY_HASH(SH_TYPE *tb, SH_ELEMENT_TYPE * entry)
#endif
}
+/* default memory allocator function */
+static inline void *SH_ALLOCATE(SH_TYPE *type, Size size);
+static inline void SH_FREE(SH_TYPE *type, void *pointer);
+
#ifndef SH_USE_NONDEFAULT_ALLOCATOR
/* default memory allocator function */