diff --git a/lib/Serialization/Module.cpp b/lib/Serialization/Module.cpp
index cb8c9cc..bed545a 100644
--- a/lib/Serialization/Module.cpp
+++ b/lib/Serialization/Module.cpp
@@ -20,8 +20,8 @@
 using namespace serialization;
 using namespace reader;
 
-ModuleFile::ModuleFile(ModuleKind Kind)
-  : Kind(Kind), DirectlyImported(false), SizeInBits(0), 
+ModuleFile::ModuleFile(ModuleKind Kind, unsigned Generation)
+  : Kind(Kind), DirectlyImported(false), Generation(Generation), SizeInBits(0), 
     LocalNumSLocEntries(0), SLocEntryBaseID(0),
     SLocEntryBaseOffset(0), SLocEntryOffsets(0),
     SLocFileOffsets(0), LocalNumIdentifiers(0),