diff --git a/basis/ui/gadgets/editors/editors.factor b/basis/ui/gadgets/editors/editors.factor
index 3eb40a5135..9461b2348f 100755
--- a/basis/ui/gadgets/editors/editors.factor
+++ b/basis/ui/gadgets/editors/editors.factor
@@ -452,6 +452,7 @@ editor "caret-motion" f {
 
 editor "selection" f {
     { T{ button-down f { S+ } 1 } extend-selection }
+    { T{ button-up f { S+ } 1 } com-copy-selection }
     { T{ drag } drag-selection }
     { gain-focus focus-editor }
     { lose-focus unfocus-editor }
diff --git a/core/definitions/definitions.factor b/core/definitions/definitions.factor
index 636067e04b..7463a863e5 100644
--- a/core/definitions/definitions.factor
+++ b/core/definitions/definitions.factor
@@ -3,6 +3,8 @@
 USING: kernel sequences namespaces assocs graphs math math.order ;
 IN: definitions
 
+MIXIN: definition
+
 ERROR: no-compilation-unit definition ;
 
 SYMBOLS: inlined-dependency flushed-dependency called-dependency ;