diff --git a/mozilla/layout/generic/nsBlockBandData.cpp b/mozilla/layout/generic/nsBlockBandData.cpp
index 5a456dff42f..5fe98ab9cbc 100644
--- a/mozilla/layout/generic/nsBlockBandData.cpp
+++ b/mozilla/layout/generic/nsBlockBandData.cpp
@@ -52,6 +52,7 @@ nsBlockBandData::Init(nsISpaceManager* aSpaceManager,
   aSpaceManager->GetTranslation(mSpaceManagerX, mSpaceManagerY);
 
   mSpace = aSpace;
+  mFloaters = 0;
   return NS_OK;
 }
 
diff --git a/mozilla/layout/html/base/src/nsBlockBandData.cpp b/mozilla/layout/html/base/src/nsBlockBandData.cpp
index 5a456dff42f..5fe98ab9cbc 100644
--- a/mozilla/layout/html/base/src/nsBlockBandData.cpp
+++ b/mozilla/layout/html/base/src/nsBlockBandData.cpp
@@ -52,6 +52,7 @@ nsBlockBandData::Init(nsISpaceManager* aSpaceManager,
   aSpaceManager->GetTranslation(mSpaceManagerX, mSpaceManagerY);
 
   mSpace = aSpace;
+  mFloaters = 0;
   return NS_OK;
 }