diff --git a/install_pmodules.sh b/install_pmodules.sh
index 665117d16dde1809a066e35c1429afc4f23454cf..3ce2ea1dfb9670cc3ce04ee59cc6c2fea2e71e09 100755
--- a/install_pmodules.sh
+++ b/install_pmodules.sh
@@ -1,7 +1,6 @@
 #!/bin/bash
 declare    BOOTSTRAP_DIR=$(dirname "$0")
 
-unset PMODULES_ROOT
 unset PMODULES_HOME
 unset PMODULES_VERSION