1 files changed, 6 insertions, 4 deletions
diff --git a/big.c b/big.c
index 9f195d3..b438b3b 100644
--- a/big.c
+++ b/big.c
@@ -551,13 +551,15 @@ word longdiv(word x, word y)
   }
 }				/* see Bird & Wadler p82 for explanation */
 
-word len(x)			/* no of digits in big x */
-word x;
+/* no of digits in big x */
+word len(word x)
 {
   word n = 1;
-  while (x = rest(x))
+  while (x = rest(x)) {
     n++;
-  return (n);
+  }
+
+  return n;
 }
 
 word msd(x)			/* most significant digit of big x */