Index: zopen.c
===================================================================
RCS file: /cvsroot/src/sbin/savecore/zopen.c,v
retrieving revision 1.3
diff -u -r1.3 zopen.c
--- zopen.c	25 Dec 2012 09:24:45 -0000	1.3
+++ zopen.c	10 Jan 2017 04:18:47 -0000
@@ -35,7 +35,7 @@
 	return NULL;
 
     if(*mode == 'r')
-	return funopen(gz, xgzread, NULL, NULL, gzclose);
+	return funopen(gz, xgzread, NULL, NULL, (int (*)(void *))gzclose);
     else
-	return funopen(gz, NULL, xgzwrite, NULL, gzclose);
+	return funopen(gz, NULL, xgzwrite, NULL, (int (*)(void *))gzclose);
 }