diff --git a/libhwcomposer/hwc_mdpcomp.cpp b/libhwcomposer/hwc_mdpcomp.cpp
index f96bc91..92a1b7a 100644
--- a/libhwcomposer/hwc_mdpcomp.cpp
+++ b/libhwcomposer/hwc_mdpcomp.cpp
@@ -360,6 +360,7 @@ bool MDPComp::is_doable(hwc_composer_device_t *dev, hwc_layer_list_t* list) {
     //Disable MDPComp when ext display connected
     if(ctx->mExtDisplay->getExternalDisplay()) {
         ALOGD_IF(isDebug(), "%s: External display connected.", __FUNCTION__);
+        return false;
     }
 
     //FB composition on idle timeout