diff --git a/popups_reference.info b/popups_reference.info
index c28a27900adf69812e273aa069f03d0fdf1ca6de..b1e503030d1032043d0eba19510c5fbc1d3e7369 100644
--- a/popups_reference.info
+++ b/popups_reference.info
@@ -3,5 +3,6 @@ name = Popups: Add & Reference
 description = In-place popup to add a new node to Node Reference widget. 
 package = User interface
 core = 6.x
+php = 5.0
 dependencies[] = popups 
 dependencies[] = content