+Index: netcat-0.7.1/src/flagset.c
+===================================================================
+--- netcat-0.7.1.orig/src/flagset.c 2009-02-06 19:56:01.000000000 +0100
++++ netcat-0.7.1/src/flagset.c 2009-02-06 19:56:13.000000000 +0100
+@@ -134,7 +134,7 @@
+
+ int netcat_flag_count(void)
+ {
+- register char c;
++ register unsigned char c;
+ register int i;
+ int ret = 0;
+
+@@ -154,7 +154,7 @@
+ Assumed that the bit number 1 is the sign, and that we will shift the
+ bit 1 (or the bit that takes its place later) until the the most right,
+ WHY it has to keep the wrong sign? */
+- ret -= (c >> 7);
++ ret += (c >> 7);
+ c <<= 1;
+ }
+ }