diff --git a/core/effects/effects-docs.factor b/core/effects/effects-docs.factor
index 44d216f872..7cd21a004e 100644
--- a/core/effects/effects-docs.factor
+++ b/core/effects/effects-docs.factor
@@ -143,4 +143,4 @@ HELP: effect>string
 
 HELP: stack-effect
 { $values { "word" word } { "effect/f" { $maybe effect } } }
-{ $description "Outputs the stack effect of a word; either a stack effect declared with " { $link POSTPONE: ( } ", or an inferred stack effect (see " { $link "inference" } "." } ;
+{ $description "Outputs the stack effect of a word; either a stack effect declared with " { $link POSTPONE: ( } ", or an inferred stack effect (see " { $link "inference" } ")." } ;