diff --git a/src/DriverUNV/UNV_Utilities.hxx b/src/DriverUNV/UNV_Utilities.hxx
index 839453eb4..bf7b8d40a 100644
--- a/src/DriverUNV/UNV_Utilities.hxx
+++ b/src/DriverUNV/UNV_Utilities.hxx
@@ -13,7 +13,7 @@
 #include <sstream>	
 #include <string>
 #include <stdexcept>
-
+#include <cassert>
 
 namespace UNV{
   using namespace std;