diff --git a/src/OpenFOAM/primitives/pTraits/pTraits.H b/src/OpenFOAM/primitives/pTraits/pTraits.H
index 9ba24049a7..bc03885bb6 100644
--- a/src/OpenFOAM/primitives/pTraits/pTraits.H
+++ b/src/OpenFOAM/primitives/pTraits/pTraits.H
@@ -53,6 +53,11 @@ class pTraits
 
 public:
 
+    pTraits(const primitive& p)
+    :
+        primitive(p)
+    {}
+
     pTraits(Istream& is)
     :
         primitive(is)