diff --git a/lib/CodeGen/AsmPrinter/DwarfDebug.h b/lib/CodeGen/AsmPrinter/DwarfDebug.h
index 4bd51677ca4..b98ace2b0f3 100644
--- a/lib/CodeGen/AsmPrinter/DwarfDebug.h
+++ b/lib/CodeGen/AsmPrinter/DwarfDebug.h
@@ -31,7 +31,6 @@
 namespace llvm {
 
 class CompileUnit;
-class DbgConcreteScope;
 class DbgVariable;
 class MachineFrameInfo;
 class MachineModuleInfo;