diff --git a/lib/CodeGen/AsmPrinter/DwarfDebug.cpp b/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
index c7b3cfe..1cd28db 100644
--- a/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
+++ b/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
@@ -1632,6 +1632,8 @@
     return;
 
   DIE *VariableDie = createGlobalVariableDIE(DI_GV);
+  if (!VariableDie)
+    return;
 
   // Add to map.
   ModuleCU->insertDIE(N, VariableDie);