diff --git a/contrib/metis/include/metis.h b/contrib/metis/include/metis.h
index dc5406ae546e532398b6d682e9a34de8cf457541..634a2f0c6f3dde489f096ba46a561db78a097bb5 100755
--- a/contrib/metis/include/metis.h
+++ b/contrib/metis/include/metis.h
@@ -30,7 +30,7 @@
  GCC does provides these definitions in stdint.h, but it may require some
  modifications on other architectures.
 --------------------------------------------------------------------------*/
-#define IDXTYPEWIDTH 32
+#define IDXTYPEWIDTH 64
 
 
 /*--------------------------------------------------------------------------