1 files changed, 1 insertions, 1 deletions
diff --git a/arith.c b/arith.c
index 450e8c5c..f9924d71 100644
--- a/arith.c
+++ b/arith.c
@@ -1700,7 +1700,7 @@ val lognot(val a, val bits)
 {
   val b;
 
-  if (bits)
+  if (default_bool_arg(bits))
     return comp_trunc(a, bits);
 
   switch (type(a)) {