diff --git a/include/h_malloc.h b/include/h_malloc.h
index f04d3cd..50001e5 100644
--- a/include/h_malloc.h
+++ b/include/h_malloc.h
@@ -48,11 +48,10 @@ extern "C" {
 #endif
 
 // C standard
-__attribute__((alloc_size(1))) void *h_malloc(size_t size);
-__attribute__((alloc_size(1, 2))) void *h_calloc(size_t nmemb, size_t size);
+__attribute__((malloc)) __attribute__((alloc_size(1))) void *h_malloc(size_t size);
+__attribute__((malloc)) __attribute__((alloc_size(1, 2))) void *h_calloc(size_t nmemb, size_t size);
 __attribute__((alloc_size(2))) void *h_realloc(void *ptr, size_t size);
-__attribute__((alloc_align(1)))
-__attribute__((alloc_size(2)))
+__attribute__((malloc)) __attribute__((alloc_size(2))) __attribute__((alloc_align(1)))
 void *h_aligned_alloc(size_t alignment, size_t size);
 void h_free(void *ptr);
 
@@ -78,12 +77,11 @@ int h_malloc_info(int options, FILE *fp);
 #endif
 
 // obsolete glibc extensions
-__attribute__((alloc_align(1)))
-__attribute__((alloc_size(2)))
+__attribute__((malloc)) __attribute__((alloc_size(2))) __attribute__((alloc_align(1)))
 void *h_memalign(size_t alignment, size_t size);
 #ifndef __ANDROID__
-void *h_valloc(size_t size);
-void *h_pvalloc(size_t size);
+__attribute__((malloc)) void *h_valloc(size_t size);
+__attribute__((malloc)) void *h_pvalloc(size_t size);
 #endif
 #ifdef __GLIBC__
 void h_cfree(void *ptr) __THROW;