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-rw-r--r--forth/types.fs1
1 files changed, 1 insertions, 0 deletions
diff --git a/forth/types.fs b/forth/types.fs
index 5b8a211..79965e8 100644
--- a/forth/types.fs
+++ b/forth/types.fs
@@ -380,6 +380,7 @@ MalDefault
nip ;;
extend as-native ;; ( obj -- obj )
extend to-list drop 0 ;;
+ extend empty? drop mal-true ;;
drop
MalNil