diff --git a/src/rxdebug/rxdebug.c b/src/rxdebug/rxdebug.c
index e4dcfcf463..3d4bf0a513 100644
--- a/src/rxdebug/rxdebug.c
+++ b/src/rxdebug/rxdebug.c
@@ -213,6 +213,7 @@ MainCommand(struct cmd_syndesc *as, void *arock)
     }
 
     if (version_flag) {
+        memset(version, 0, sizeof(version));
 
 	code = rx_GetServerVersion(s, host, port, length, version);
 	if (code < 0) {
@@ -220,6 +221,7 @@ MainCommand(struct cmd_syndesc *as, void *arock)
 		   errno);
 	    exit(1);
 	}
+        version[sizeof(version) - 1] = '\0';
 	printf("AFS version: %s\n", version);
 	fflush(stdout);