diff --git a/tools/profile.d-usrblackbox.sh b/tools/profile.d-usrblackbox.sh
index 6c69b47..5b1106b 100644
--- a/tools/profile.d-usrblackbox.sh
+++ b/tools/profile.d-usrblackbox.sh
@@ -1,2 +1,7 @@
 # Prepend to $PATH.
-pathmunge /usr/blackbox/bin
+
+if type pathmunge > /dev/null 2>&1 ; then
+    pathmunge /usr/blackbox/bin
+elif ! echo $PATH | grep -Eq "(^|:)/usr/blackbox/bin($|:)" ; then
+    PATH=/usr/blackbox/bin:$PATH
+fi