diff --git a/src/build/toolset.jam b/src/build/toolset.jam
index 7ada583ee..8d2be4d08 100644
--- a/src/build/toolset.jam
+++ b/src/build/toolset.jam
@@ -455,9 +455,9 @@ rule inherit-rules ( toolset : base )
     local rules ;
     for local g in $(base-generators)
     {
-        local id = [ MATCH "[^.]*\.(.*)" : [ $(g).id ] ] ;
-        rules += $(id) ;
+        rules += [ MATCH "[^.]*\.(.*)" : [ $(g).rule-name ] ] ;
     }
+    rules = [ sequence.unique $(rules) ] ;
     IMPORT $(base) : $(rules) : $(toolset) : $(rules) ;
     IMPORT $(base) : $(rules) : : $(toolset).$(rules) ;
 }