diff --git a/lib/CodeGen/AsmPrinter/DwarfDebug.h b/lib/CodeGen/AsmPrinter/DwarfDebug.h
index 1a036885b2e..e28f70808d5 100644
--- a/lib/CodeGen/AsmPrinter/DwarfDebug.h
+++ b/lib/CodeGen/AsmPrinter/DwarfDebug.h
@@ -41,7 +41,6 @@ class DIEAbbrev;
 class DIE;
 class DIEBlock;
 class DIEEntry;
-class DwarfDebug;
 
 //===----------------------------------------------------------------------===//
 /// \brief This class is used to record source line correspondence.