diff --git a/src/utils.c b/src/utils.c
index 6dc17f1d..0100c256 100644
--- a/src/utils.c
+++ b/src/utils.c
@@ -263,24 +263,6 @@ ss_aligned_malloc(size_t size)
     }
 }
 
-void
-ss_aligned_free(void *ptr)
-{
-#ifdef __MINGW32__
-    _aligned_free(ptr);
-#else
-    free(ptr);
-#endif
-    ptr = NULL;
-}
-
-void
-ss_free(void *ptr)
-{
-    free(ptr);
-    ptr = NULL;
-}
-
 void *
 ss_realloc(void *ptr, size_t new_size)
 {
diff --git a/src/utils.h b/src/utils.h
index e9ae0530..b95729dd 100644
--- a/src/utils.h
+++ b/src/utils.h
@@ -229,8 +229,22 @@ int set_nofile(int nofile);
 void *ss_malloc(size_t size);
 void *ss_aligned_malloc(size_t size);
 void *ss_realloc(void *ptr, size_t new_size);
-void ss_aligned_free(void *ptr);
-void ss_free(void *ptr);
+
+#define ss_free(ptr) \
+{ \
+    free(ptr); \
+    ptr = NULL; \
+}
+
+#ifdef __MINGW32__
+#define ss_aligned_free(ptr) \
+{ \
+    _aligned_free(ptr); \
+    ptr = NULL; \
+}
+#else
+#define ss_aligned_free(ptr) ss_free(ptr)
+#endif
 
 int ss_is_ipv6addr(const char *addr);