diff --git a/package/boot/rbcfg/src/main.c b/package/boot/rbcfg/src/main.c
index 5614a6c223..b7cf79ffae 100644
--- a/package/boot/rbcfg/src/main.c
+++ b/package/boot/rbcfg/src/main.c
@@ -724,7 +724,7 @@ usage(void)
 		const struct rbcfg_command *cmd;
 		cmd = &rbcfg_commands[i];
 
-		len = snprintf(buf, sizeof(buf), cmd->usage);
+		len = snprintf(buf, sizeof(buf), "%s", cmd->usage);
 		buf[len] = '\0';
 		fprintf(stderr, "%s\n", buf);
 	}