diff -ur squashfs4.0.orig/squashfs-tools/unsquashfs.c squashfs4.0/squashfs-tools/unsquashfs.c
--- squashfs4.0.orig/squashfs-tools/unsquashfs.c	2009-11-05 11:03:12.758230152 -0500
+++ squashfs4.0/squashfs-tools/unsquashfs.c	2009-11-05 11:21:23.334211515 -0500
@@ -1871,13 +1871,19 @@
 
 void progress_bar(long long current, long long max, int columns)
 {
+
 	char rotate_list[] = { '|', '/', '-', '\\' };
-	int max_digits = floor(log10(max)) + 1;
-	int used = max_digits * 2 + 11;
-	int hashes = (current * (columns - used)) / max;
-	int spaces = columns - used - hashes;
+	int max_digits, used, hashes, spaces;
 	static int tty = -1;
 
+	if (max == 0)
+		return;
+
+	max_digits = floor(log10(max)) + 1;
+	used = max_digits * 2 + 11;
+	hashes = (current * (columns - used)) / max;
+	spaces = columns - used - hashes;
+
 	if((current > max) || (columns - used < 0))
 		return;