diff --git a/gfx/layers/apz/src/APZCTreeManager.cpp b/gfx/layers/apz/src/APZCTreeManager.cpp
index 7e6e36e6dd1e..ebc5f7dd49f9 100644
--- a/gfx/layers/apz/src/APZCTreeManager.cpp
+++ b/gfx/layers/apz/src/APZCTreeManager.cpp
@@ -707,7 +707,7 @@ APZCTreeManager::ProcessTouchInput(MultiTouchInput& aInput,
   }
 
   // If it's the end of the touch sequence then clear out variables so we
-  // keep dangling references and leak things.
+  // don't keep dangling references and leak things.
   if (mTouchCount == 0) {
     mApzcForInputBlock = nullptr;
     mInOverscrolledApzc = false;