diff --git a/src/w_wad.c b/src/w_wad.c
index 5d0e46f2..6b65b285 100644
--- a/src/w_wad.c
+++ b/src/w_wad.c
@@ -1385,7 +1385,9 @@ void zerr(int ret)
 }
 #endif
 
+#ifndef HAVE_PNG
 #define NO_PNG_LUMPS
+#endif
 
 #ifdef NO_PNG_LUMPS
 static void ErrorIfPNG(UINT8 *d, size_t s, char *f, char *l)