diff --git a/zsnes/src/dos/zfile.c b/zsnes/src/dos/zfile.c
index 3e298d77..bd773c05 100644
--- a/zsnes/src/dos/zfile.c
+++ b/zsnes/src/dos/zfile.c
@@ -135,7 +135,7 @@ DWORD ZOpenFile()
 		if (TextFile) 
 			FILEHANDLE[CurrentHandle]=fopen(ZOpenFileName,"r+b");
 		else
-			FILEHANDLE[CurrentHandle]=gzopen(ZOpenFileName,"r+b");
+			FILEHANDLE[CurrentHandle]=(FILE *)gzopen(ZOpenFileName,"r+b");
 		if(FILEHANDLE[CurrentHandle]!=NULL)	       
 		{
 			CurrentHandle+=1;