diff --git a/extra/mason/release/tidy/tidy.factor b/extra/mason/release/tidy/tidy.factor
index d12692cc46..aeb6770a0a 100644
--- a/extra/mason/release/tidy/tidy.factor
+++ b/extra/mason/release/tidy/tidy.factor
@@ -24,6 +24,7 @@ CONSTANT: cleanup-list {
     "factor.lib"
     "libfactor-ffi-test.exp"
     "libfactor-ffi-test.lib"
+    "libfactor-ffi-test.dylib"
 }
 
 : useless-files ( -- seq )