diff --git a/js-solutions/Bit-counting.js b/js-solutions/Bit-counting.js
index 3eba3ad..8c00690 100644
--- a/js-solutions/Bit-counting.js
+++ b/js-solutions/Bit-counting.js
@@ -1 +1 @@
-var countBits = (n) => (n.toString(2).match(/[1]/g) || "").;
+var countBits = (n) => (n.toString(2).match(/[1]/g) || "").length;