1 files changed, 14 insertions, 10 deletions

diff --git a/std/io.toc b/std/io.toc
index 51cfd76..fac4921 100644
--- a/std/io.toc
+++ b/std/io.toc
@@ -38,16 +38,20 @@ puti ::= fn(x: int) {
 	   toc_putchar('-');
 	   // NOTE: don't do x = -x; here to make sure I64_MIN works
 	}
-	abs ::= fn(x: int) int { if x < 0 { -x } else { x } };
-	scan_digit := 1000000000000000000;
-	started := false;
-	while scan_digit > 0 {
-		digit := abs((x / scan_digit) % 10);
-		if digit > 0 { started = true; }
-		if started {
-		   toc_putchar((('0' as int) + digit) as char);
+	if x == 0 {
+		toc_putchar('0');
+	} else {
+		abs ::= fn(x: int) int { if x < 0 { -x } else { x } };
+		scan_digit := 1000000000000000000;
+		started := false;
+		while scan_digit > 0 {
+			digit := abs((x / scan_digit) % 10);
+			if digit > 0 { started = true; }
+			if started {
+			   toc_putchar((('0' as int) + digit) as char);
+			}
+			scan_digit /= 10;
 		}
-		scan_digit /= 10;
 	}
 	toc_putchar('\n');
-};
\ No newline at end of file
+};