diff --git a/src/search.cpp b/src/search.cpp
index ba9c2274..a1bdcc39 100644
--- a/src/search.cpp
+++ b/src/search.cpp
@@ -91,7 +91,7 @@ Depth AIAlgorithm::changeDepth()
         +10, 12, +12, 12,     /* 4 ~ 7 */
         +12, 13, +13, 13,     /* 8 ~ 11 */
         +13, 13, +13, 13,     /* 12 ~ 15 */
-        +13, 13,              /* 16 ~ 18 */
+        +13, 13, +13          /* 16 ~ 18 */
     };
 
     const Depth movingDepthTable[] = {