diff --git a/quickstep/src/com/android/quickstep/TouchInteractionService.java b/quickstep/src/com/android/quickstep/TouchInteractionService.java
index 4fc9770..338a6ef 100644
--- a/quickstep/src/com/android/quickstep/TouchInteractionService.java
+++ b/quickstep/src/com/android/quickstep/TouchInteractionService.java
@@ -496,6 +496,13 @@
             Point sz = new Point();
             display.getRealSize(sz);
             if (rotation != Surface.ROTATION_0) {
+                if ((rotation % 2) != 0) {
+                    // via display-manager, the display size is unrotated, so "rotate" its size
+                    // to match the rotation we are transforming the event into.
+                    final int tmpX = sz.x;
+                    sz.x = sz.y;
+                    sz.y = tmpX;
+                }
                 event.transform(InputChannelCompat.createRotationMatrix(rotation, sz.x, sz.y));
             }
         }