diff --git a/src/client/minidump_file_writer.h b/src/client/minidump_file_writer.h
index cded3585..21d4ce68 100644
--- a/src/client/minidump_file_writer.h
+++ b/src/client/minidump_file_writer.h
@@ -151,7 +151,8 @@ class UntypedMDRVA {
 
   // Return size and position
   inline MDLocationDescriptor location() const {
-    MDLocationDescriptor location = { static_cast<int>(size_), position_ };
+    MDLocationDescriptor location = { static_cast<u_int32_t>(size_),
+                                      position_ };
     return location;
   }