diff --git a/layout/xul/tree/nsTreeColumns.cpp b/layout/xul/tree/nsTreeColumns.cpp
index 209a2582b0d9..8ec3376b92a9 100644
--- a/layout/xul/tree/nsTreeColumns.cpp
+++ b/layout/xul/tree/nsTreeColumns.cpp
@@ -433,7 +433,7 @@ void nsTreeColumns::EnsureColumns() {
     if (!colFrame) return;
 
     colFrame = colFrame->GetParent();
-    if (!colFrame) return;
+    if (!colFrame || !colFrame->GetContent()) return;
 
     nsTreeColumn* currCol = nullptr;