--- pgp/src/zglobals.c	2018/04/24 16:37:53	1.1.1.1
+++ pgp/src/zglobals.c	2018/04/24 16:41:04	1.1.1.4
@@ -18,4 +18,4 @@
 /* Argument processing globals */
 int method = BEST;      /* one of BEST, DEFLATE (only), or STORE (only) */
 int level = 5;          /* 0=fastest compression, 9=best compression */
-char *special = NULL;   /* List of special suffixes */
+char *special = (char *)NULL;   /* List of special suffixes */