diff --git a/lib/argv_split.c b/lib/argv_split.c
index 4096ed4..fad6ce4 100644
--- a/lib/argv_split.c
+++ b/lib/argv_split.c
@@ -75,7 +75,9 @@
 	if (argv == NULL)
 		goto out;
 
-	*argcp = argc;
+	if (argcp)
+		*argcp = argc;
+
 	argvp = argv;
 
 	while (*str) {