1 files changed, 1 insertions, 0 deletions
diff --git a/include/clang/Serialization/GlobalModuleIndex.h b/include/clang/Serialization/GlobalModuleIndex.h
index ab91f40..76414ba 100644
--- a/include/clang/Serialization/GlobalModuleIndex.h
+++ b/include/clang/Serialization/GlobalModuleIndex.h
@@ -34,6 +34,7 @@ namespace clang {
 class DirectoryEntry;
 class FileEntry;
 class FileManager;
+class IdentifierIterator;
 
 namespace serialization {
   class ModuleFile;