diff --git a/libhwcomposer/hwc_mdpcomp.cpp b/libhwcomposer/hwc_mdpcomp.cpp
index 0331864..b80046e 100644
--- a/libhwcomposer/hwc_mdpcomp.cpp
+++ b/libhwcomposer/hwc_mdpcomp.cpp
@@ -347,8 +347,9 @@
 
     hwc_rect_t crop = integerizeSourceCrop(layer->sourceCropf);
     hwc_rect_t dst = layer->displayFrame;
-    int crop_w = crop.right - crop.left;
-    int crop_h = crop.bottom - crop.top;
+    bool rotated90 = (bool)layer->transform & HAL_TRANSFORM_ROT_90;
+    int crop_w = rotated90 ? crop.bottom - crop.top : crop.right - crop.left;
+    int crop_h = rotated90 ? crop.right - crop.left : crop.bottom - crop.top;
     int dst_w = dst.right - dst.left;
     int dst_h = dst.bottom - dst.top;
     float w_scale = ((float)crop_w / (float)dst_w);