diff --git a/test/dt_RunDrawTest.C b/test/dt_RunDrawTest.C
index 038ba5a9ace07f8fd4fbbedce01e55c052d9dd96..03ee0d33139ec2c11a52f0154344c97eb6f39254 100644
--- a/test/dt_RunDrawTest.C
+++ b/test/dt_RunDrawTest.C
@@ -8,7 +8,7 @@
 
 #include "TBranchElement.h"
 
-#include "iostream.h"
+#include "Riostream.h"
 
 #include "dt_DrawTest.C"