diff --git a/res/rres_packer.c b/res/rres_packer.c
index b573def..1ff236c 100644
--- a/res/rres_packer.c
+++ b/res/rres_packer.c
@@ -3,7 +3,10 @@
 #define RRES_IMPLEMENTATION
 #include "rres.h"              // Required to read rres data chunks
 
+#include <stdlib.h>
 #include <stdint.h>
+#include <stdio.h>
+#include <string.h>
 
 // Load a continuous data buffer from rresResourceChunkData struct
 static unsigned char *LoadDataBuffer(rresResourceChunkData data, unsigned int rawSize)