diff --git a/lib/zclient.c b/lib/zclient.c
index 5df420f..98829f6 100644
--- a/lib/zclient.c
+++ b/lib/zclient.c
@@ -167,7 +167,7 @@
 #include <sys/un.h>
 
 int
-zclient_socket_un (char *path)
+zclient_socket_un (const char *path)
 {
   int ret;
   int sock, len;