1 files changed, 1 insertions, 1 deletions
diff --git a/arith.c b/arith.c
index 4ee87055..5dd42347 100644
--- a/arith.c
+++ b/arith.c
@@ -890,7 +890,7 @@ static val to_float(val func, val num)
   case FLNUM:
     return num;
   default:
-    uw_throwf(error_s, lit("~s: invalid operand ~s"), func, num);
+    uw_throwf(error_s, lit("~s: invalid operand ~s"), func, num, nao);
   }
 }