diff --git a/apps/s_server.c b/apps/s_server.c
index 059c4a0..a5e8bcd 100644
--- a/apps/s_server.c
+++ b/apps/s_server.c
@@ -525,7 +525,7 @@
 	int vflags = 0;
 	short port=PORT;
 	char *CApath=NULL,*CAfile=NULL;
-	char *context = NULL;
+	unsigned char *context = NULL;
 	char *dhfile = NULL;
 	char *named_curve = NULL;
 	int badop=0,bugs=0;
@@ -604,7 +604,7 @@
 		else if	(strcmp(*argv,"-context") == 0)
 			{
 			if (--argc < 1) goto bad;
-			context= *(++argv);
+			context= (unsigned char *)*(++argv);
 			}
 		else if	(strcmp(*argv,"-cert") == 0)
 			{