diff --git a/mozilla/layout/base/nsPresShell.cpp b/mozilla/layout/base/nsPresShell.cpp
index b0ad140be47..0a7b826d4cd 100644
--- a/mozilla/layout/base/nsPresShell.cpp
+++ b/mozilla/layout/base/nsPresShell.cpp
@@ -6138,7 +6138,7 @@ PresShell::AddDummyLayoutRequest(void)
 { 
   nsresult rv = NS_OK;
 
-  if (gAsyncReflowDuringDocLoad) {
+  if (gAsyncReflowDuringDocLoad && !mIsReflowing) {
     rv = DummyLayoutRequest::Create(getter_AddRefs(mDummyLayoutRequest), this);
     if (NS_FAILED(rv)) return rv;
 
diff --git a/mozilla/layout/html/base/src/nsPresShell.cpp b/mozilla/layout/html/base/src/nsPresShell.cpp
index b0ad140be47..0a7b826d4cd 100644
--- a/mozilla/layout/html/base/src/nsPresShell.cpp
+++ b/mozilla/layout/html/base/src/nsPresShell.cpp
@@ -6138,7 +6138,7 @@ PresShell::AddDummyLayoutRequest(void)
 { 
   nsresult rv = NS_OK;
 
-  if (gAsyncReflowDuringDocLoad) {
+  if (gAsyncReflowDuringDocLoad && !mIsReflowing) {
     rv = DummyLayoutRequest::Create(getter_AddRefs(mDummyLayoutRequest), this);
     if (NS_FAILED(rv)) return rv;