diff --git a/basis/compiler/cfg/stacks/clearing/clearing-docs.factor b/basis/compiler/cfg/stacks/clearing/clearing-docs.factor
index 4b2e912504..bfda1f1296 100644
--- a/basis/compiler/cfg/stacks/clearing/clearing-docs.factor
+++ b/basis/compiler/cfg/stacks/clearing/clearing-docs.factor
@@ -1,4 +1,5 @@
-USING: compiler.cfg compiler.cfg.instructions help.markup help.syntax sequences strings ;
+USING: compiler.cfg compiler.cfg.instructions help.markup
+help.syntax kernel sequences strings ;
 IN: compiler.cfg.stacks.clearing
 
 ARTICLE: "compiler.cfg.stacks.clearing" "Uninitialized stack location clearing"
@@ -16,16 +17,16 @@ ARTICLE: "compiler.cfg.stacks.clearing" "Uninitialized stack location clearing"
 } ;
 
 HELP: dangerous-insn?
-{ $values { "state" "a stack state" } { "insn" insn } }
+{ $values { "state" "a stack state" } { "insn" insn } { "?" boolean } }
 { $description "Checks if the instruction is dangerous (can cause a stack underflow). " }
 { $examples
   { $example
-    "USING: compiler.cfg.instructions compiler.cfg.registers prettyprint ;"
+    "USING: compiler.cfg.instructions compiler.cfg.registers compiler.cfg.stacks.clearing prettyprint ;"
     "{ { 0 { } } { 0 { } } } T{ ##peek { loc D 0 } } dangerous-insn? ."
     "t"
   }
   { $example
-    "USING: compiler.cfg.instructions compiler.cfg.registers prettyprint ;"
+    "USING: compiler.cfg.instructions compiler.cfg.registers compiler.cfg.stacks.clearing prettyprint ;"
     "{ { 0 { } } { 2 { 0 1 } } } T{ ##peek { loc R 0 } } dangerous-insn? ."
     "f"
   }