diff --git a/base/modules/fakempi.c b/base/modules/fakempi.c
index dd6803407..b50fb1d4b 100644
--- a/base/modules/fakempi.c
+++ b/base/modules/fakempi.c
@@ -107,7 +107,7 @@
 double mpi_wtime()
 {
 #if defined(WIN32) || defined(_WIN32)
-  Int64 tim, freq;
+  __int64 tim, freq;
   double seconds;
 
   QueryPerformanceCounter(&tim);