diff --git a/lib/matrix.js b/lib/matrix.js
index 34b2d97..b232d36 100644
--- a/lib/matrix.js
+++ b/lib/matrix.js
@@ -67,7 +67,7 @@ class Matrix {
   static multiply(a, b) {
     // Matrix product
     if (a.cols !== b.rows) {
-      console.log('Columns of A must match rows of B.')
+      console.log('Columns of A must match rows of B.');
       return;
     }