diff --git a/layout/generic/nsBlockFrame.cpp b/layout/generic/nsBlockFrame.cpp
index 75745c135a5d..3ff385a4fab0 100644
--- a/layout/generic/nsBlockFrame.cpp
+++ b/layout/generic/nsBlockFrame.cpp
@@ -6420,7 +6420,6 @@ nsBlockFrame::ChildIsDirty(nsIFrame* aChild)
       // frame destruction, leading to null placeholders, but we're safe
       // ignoring those.
       if (placeholderPath) {
-        nsIFrame *placeholderPathFC = placeholderPath->GetFirstContinuation();
         for (;;) {
           nsIFrame *parent = placeholderPath->GetParent();
           if (parent->GetContent() == mContent &&