diff --git a/src/utils.c b/src/utils.c
index 55840369..2b0f052b 100644
--- a/src/utils.c
+++ b/src/utils.c
@@ -263,6 +263,17 @@ ss_align(size_t size)
     }
 }
 
+void
+ss_free(void *ptr)
+{
+#ifdef __MINGW32__
+    _aligned_free(ptr);
+#else
+    free(ptr);
+#endif
+    ptr = NULL;
+}
+
 void *
 ss_realloc(void *ptr, size_t new_size)
 {
diff --git a/src/utils.h b/src/utils.h
index cbe5972a..b5d501b6 100644
--- a/src/utils.h
+++ b/src/utils.h
@@ -229,15 +229,10 @@ int set_nofile(int nofile);
 void *ss_malloc(size_t size);
 void *ss_align(size_t size);
 void *ss_realloc(void *ptr, size_t new_size);
+void ss_free(void *ptr);
 
 int ss_is_ipv6addr(const char *addr);
 
-#define ss_free(ptr)     \
-    do {                 \
-        free(ptr);       \
-        ptr = NULL;      \
-    } while (0)
-
 char *get_default_conf(void);
 
 #endif // _UTILS_H