diff -Naur a/fceu2.1.5/src/file.cpp b/fceu2.1.5/src/file.cpp
--- a/fceu2.1.5/src/file.cpp	2010-09-19 00:05:09.000000000 +0000
+++ b/fceu2.1.5/src/file.cpp	2012-03-01 19:21:25.856204727 +0000
@@ -310,7 +310,7 @@
 				if(magic==0x088b1f) {
 					 // maybe gzip... 
 
-					void* gzfile = gzopen(fileToOpen.c_str(),"rb");
+					gzFile gzfile = gzopen(fileToOpen.c_str(),"rb");
 					if(gzfile) {
 						delete fp;