diff --git a/dynamic_programming/word_break.cpp b/dynamic_programming/word_break.cpp
index 03003fb0d..fa5048a38 100644
--- a/dynamic_programming/word_break.cpp
+++ b/dynamic_programming/word_break.cpp
@@ -144,6 +144,9 @@ class Solution {
         return check(s, strSet, 0, &dp);
     }
 };
+}  // namespace word_break
+}  // namespace dynamic_programming
+
 
 /**
  * @brief Main function