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-rw-r--r--src/algebra/strap/NNI.lsp5
1 files changed, 2 insertions, 3 deletions
diff --git a/src/algebra/strap/NNI.lsp b/src/algebra/strap/NNI.lsp
index 8ec72966..1288e89c 100644
--- a/src/algebra/strap/NNI.lsp
+++ b/src/algebra/strap/NNI.lsp
@@ -37,9 +37,8 @@
((< |c| 0) (CONS 1 "failed"))
('T
(CONS 0
- (PROG1 |c|
- (|check-subtype| (>= |c| 0)
- '(|NonNegativeInteger|) |c|))))))))))
+ (|check-subtype| (>= |c| 0)
+ '(|NonNegativeInteger|) |c|)))))))))
(DEFUN |NonNegativeInteger| ()
(PROG ()