diff --git a/src/glog/logging.h.in b/src/glog/logging.h.in
index cb19032..8edb669 100644
--- a/src/glog/logging.h.in
+++ b/src/glog/logging.h.in
@@ -1034,7 +1034,7 @@ extern "C" void AnnotateBenignRaceSized(
   const char *file,
   int line,
   const volatile void *mem,
-  long size,
+  size_t size,
   const char *description);
 
 namespace google {