diff --git a/lib/libc/stdlib/tsearch.3 b/lib/libc/stdlib/tsearch.3
index c0af27f79aa0..7a204d06e110 100644
--- a/lib/libc/stdlib/tsearch.3
+++ b/lib/libc/stdlib/tsearch.3
@@ -42,7 +42,7 @@
 .Ft void *
 .Fn tsearch "const void *key" "void **rootp" "int (*compar) (const void *, const void *)"
 .Ft void
-.Fn twalk "const void *root" "void (*compar) (const void *, VISIT, int)"
+.Fn twalk "const void *root" "void (*action) (const void *, VISIT, int)"
 .Sh DESCRIPTION
 The
 .Fn tdelete ,