fixed old gcc compilation bug

1 files changed, 1 insertions, 1 deletions

diff --git a/lib/Sema/Spec.cpp b/lib/Sema/Spec.cpp
index dc66d912db..908f250d39 100644
--- a/lib/Sema/Spec.cpp
+++ b/lib/Sema/Spec.cpp
@@ -78,7 +78,7 @@ void SpecificationScope::AddDimensionSpec(SourceLocation Loc, SourceLocation IDL
     return;
   auto Start = Dimensions.size();
   Dimensions.append(Dims.begin(), Dims.end());
-  StoredDimensionSpec Spec = { Loc, IDLoc, IDInfo, Start, Dims.size() };
+  StoredDimensionSpec Spec = { Loc, IDLoc, IDInfo, unsigned(Start), unsigned(Dims.size()) };
   DimensionSpecs.push_back(Spec);
 }