diff --git a/basis/debugger/debugger.factor b/basis/debugger/debugger.factor
index b6497c52a9..69156208b8 100644
--- a/basis/debugger/debugger.factor
+++ b/basis/debugger/debugger.factor
@@ -328,6 +328,10 @@ M: lexer-error error-help
 
 M: bad-effect summary
     drop "Bad stack effect declaration" ;
+M: invalid-effect-variable summary
+    drop "Stack effect variables can only occur as the first input or output" ;
+M: effect-variable-can't-have-type summary
+    drop "Stack effect variables cannot have a declared type" ;
 
 M: bad-escape error.
     "Bad escape code: \\" write
diff --git a/basis/stack-checker/errors/prettyprint/prettyprint.factor b/basis/stack-checker/errors/prettyprint/prettyprint.factor
index 9d36e9c56c..589bd0a056 100644
--- a/basis/stack-checker/errors/prettyprint/prettyprint.factor
+++ b/basis/stack-checker/errors/prettyprint/prettyprint.factor
@@ -73,8 +73,3 @@ M: invalid-quotation-input error.
     dup summary print
     [ quots>> ] [ branches>> ] bi quots-and-branches. ;
 
-M: invalid-effect-variable summary
-    drop "Stack effect variables can only occur as the first input or output" ;
-M: effect-variable-can't-have-type summary
-    drop "Stack effect variables cannot have a declared type" ;
-