diff --git a/mozilla/layout/generic/nsInlineFrame.h b/mozilla/layout/generic/nsInlineFrame.h
index 60c5f007bb9..442f9e86467 100644
--- a/mozilla/layout/generic/nsInlineFrame.h
+++ b/mozilla/layout/generic/nsInlineFrame.h
@@ -96,6 +96,13 @@ protected:
     nsInlineFrame* mNextInFlow;
     PRBool mSetParentPointer;  // when reflowing child frame first set its
                                // parent frame pointer
+
+    InlineReflowState()  {
+      mNextRCFrame = nsnull;
+      mPrevFrame = nsnull;
+      mNextInFlow = nsnull;
+      mSetParentPointer = PR_TRUE;
+    };
   };
 
   nsInlineFrame();
diff --git a/mozilla/layout/html/base/src/nsInlineFrame.h b/mozilla/layout/html/base/src/nsInlineFrame.h
index 60c5f007bb9..442f9e86467 100644
--- a/mozilla/layout/html/base/src/nsInlineFrame.h
+++ b/mozilla/layout/html/base/src/nsInlineFrame.h
@@ -96,6 +96,13 @@ protected:
     nsInlineFrame* mNextInFlow;
     PRBool mSetParentPointer;  // when reflowing child frame first set its
                                // parent frame pointer
+
+    InlineReflowState()  {
+      mNextRCFrame = nsnull;
+      mPrevFrame = nsnull;
+      mNextInFlow = nsnull;
+      mSetParentPointer = PR_TRUE;
+    };
   };
 
   nsInlineFrame();