diff --git a/dynamic_programming/knapsack.py b/dynamic_programming/knapsack.py
index a0b006a58..27d1cfed7 100644
--- a/dynamic_programming/knapsack.py
+++ b/dynamic_programming/knapsack.py
@@ -28,7 +28,7 @@ def knapsack(W, wt, val, n):
 
     return dp[n][w]
 
-if name == '__main__':
+if __name__ == '__main__':
     '''
     Adding test case for knapsack
     '''