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-rw-r--r--lib.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/lib.c b/lib.c
index 2f3f6603..51092c36 100644
--- a/lib.c
+++ b/lib.c
@@ -3153,7 +3153,7 @@ val separate(val pred, val seq_in, val keyfun_in)
switch (type(seq_in)) {
case NIL:
- return nil;
+ return cons(nil, cons(nil, nil));
case CONS:
case LCONS:
case COBJ: