diff --git a/src/my_pool_chunk.h b/src/my_pool_chunk.h
index 7785ca41d6..61e9e604ca 100644
--- a/src/my_pool_chunk.h
+++ b/src/my_pool_chunk.h
@@ -148,7 +148,7 @@ class MyPoolChunk {
   }
 
   // return indexed chunk to pool via free list
-  // index = -1 for no allocated chunk
+  // index = -1 if no allocated chunk
 
   void put(int index) {
     if (index < 0) return;