diff --git a/layout/forms/nsListControlFrame.cpp b/layout/forms/nsListControlFrame.cpp
index c3d52fa1e26..71e65069274 100644
--- a/layout/forms/nsListControlFrame.cpp
+++ b/layout/forms/nsListControlFrame.cpp
@@ -1007,7 +1007,7 @@ nsIContent *
 nsListControlFrame::GetOptionFromContent(nsIContent *aContent) 
 {
   nsIContent * content = aContent;
-  NS_ADDREF(content);
+  NS_IF_ADDREF(content);
   while (nsnull != content) {
     if (IsOptionElement(content)) {
       return content;
diff --git a/layout/html/forms/src/nsListControlFrame.cpp b/layout/html/forms/src/nsListControlFrame.cpp
index c3d52fa1e26..71e65069274 100644
--- a/layout/html/forms/src/nsListControlFrame.cpp
+++ b/layout/html/forms/src/nsListControlFrame.cpp
@@ -1007,7 +1007,7 @@ nsIContent *
 nsListControlFrame::GetOptionFromContent(nsIContent *aContent) 
 {
   nsIContent * content = aContent;
-  NS_ADDREF(content);
+  NS_IF_ADDREF(content);
   while (nsnull != content) {
     if (IsOptionElement(content)) {
       return content;