diff --git a/ditchers/ditcher/src/savepng/IMG_savepng.cpp b/ditchers/ditcher/src/savepng/IMG_savepng.cpp
index c6509b5..85771cb 100644
--- a/ditchers/ditcher/src/savepng/IMG_savepng.cpp
+++ b/ditchers/ditcher/src/savepng/IMG_savepng.cpp
@@ -28,6 +28,7 @@
 #include "SDL.h"
 #include "SDL_byteorder.h"
 #include <png.h>
+#include <zlib.h>
 #include "savepng/IMG_savepng.h"
 
 int IMG_SavePNG(const char *file, SDL_Surface *surf,int compression){