diff --git a/lib/Sema/SemaDecl.cpp b/lib/Sema/SemaDecl.cpp
index cdb6930..f5681af 100644
--- a/lib/Sema/SemaDecl.cpp
+++ b/lib/Sema/SemaDecl.cpp
@@ -604,6 +604,8 @@
           VD->getStorageClass() != VarDecl::PrivateExtern) {
         Diag(VD->getLocation(), diag::err_redefinition) << VD->getDeclName();
         Diag(OldDecl->getLocation(), diag::note_previous_definition);
+        // One redefinition error is enough.
+        break;
       }
     }
   }