diff --git a/layout/generic/nsFrame.cpp b/layout/generic/nsFrame.cpp
index ba4a0531ad9..e88a5deb855 100644
--- a/layout/generic/nsFrame.cpp
+++ b/layout/generic/nsFrame.cpp
@@ -1436,8 +1436,8 @@ nsFrame::DisplayBorderBackgroundOutline(nsDisplayListBuilder*   aBuilder,
   if (!IsVisibleForPainting(aBuilder))
     return NS_OK;
 
-  bool hasBoxShadow = GetStyleBorder()->mBoxShadow != nsnull;
-  if (hasBoxShadow) {
+  nsCSSShadowArray* shadows = GetStyleBorder()->mBoxShadow;
+  if (shadows && shadows->HasShadowWithInset(false)) {
     nsresult rv = aLists.BorderBackground()->AppendNewToTop(new (aBuilder)
         nsDisplayBoxShadowOuter(aBuilder, this));
     NS_ENSURE_SUCCESS(rv, rv);
@@ -1448,7 +1448,7 @@ nsFrame::DisplayBorderBackgroundOutline(nsDisplayListBuilder*   aBuilder,
     DisplayBackgroundUnconditional(aBuilder, aLists, aForceBackground, &bg);
   NS_ENSURE_SUCCESS(rv, rv);
 
-  if (hasBoxShadow) {
+  if (shadows && shadows->HasShadowWithInset(true)) {
     rv = aLists.BorderBackground()->AppendNewToTop(new (aBuilder)
         nsDisplayBoxShadowInner(aBuilder, this));
     NS_ENSURE_SUCCESS(rv, rv);
diff --git a/layout/style/nsStyleStruct.h b/layout/style/nsStyleStruct.h
index 369eddc3a84..d3db6dbadd6 100644
--- a/layout/style/nsStyleStruct.h
+++ b/layout/style/nsStyleStruct.h
@@ -724,6 +724,14 @@ class nsCSSShadowArray {
       return &mArray[i];
     }
 
+    bool HasShadowWithInset(bool aInset) {
+      for (PRUint32 i = 0; i < mLength; ++i) {
+        if (mArray[i].mInset == aInset)
+          return true;
+      }
+      return false;
+    }
+
     NS_INLINE_DECL_REFCOUNTING(nsCSSShadowArray)
 
   private: