diff --git a/src/strlen.🗿 b/src/strlen.🗿
index 5d72e92..ed33b64 100644
--- a/src/strlen.🗿
+++ b/src/strlen.🗿
@@ -1,6 +1,8 @@
 strlen(str) {
 	local i = 0;
 
+	if (str == NULL)
+		return 0;
 	loop {
 		if ([str + i] == 0)
 			return (i);