diff --git a/MPI/OPAL/modulefile b/MPI/OPAL/modulefile
index 3fdb260..2ff1e1e 100644
--- a/MPI/OPAL/modulefile
+++ b/MPI/OPAL/modulefile
@@ -1,7 +1,7 @@
 #%Module1.0
 
 # OPAL_PREFIX is also used by OpenMPI!
-module-dont-setenv { OPAL_PREFIX }
+set dont-setenv { OPAL_PREFIX }
 
 module-whatis	     	"Object Oriented Particle Accelerator Library"
 module-url		"http://amas.psi.ch/OPAL"