diff --git a/ports/gilbert.c b/ports/gilbert.c
index 10fa13f..6e300d3 100644
--- a/ports/gilbert.c
+++ b/ports/gilbert.c
@@ -175,8 +175,6 @@ int gilbert_d2xy_r(int dst_idx, int cur_idx,
                    int *xres, int *yres,
                    int ax,int ay,
                    int bx,int by ) {
-  static int max_iter = 0;
-
   int nxt_idx;
   int w, h, x, y,
       dax, day,
@@ -184,9 +182,6 @@ int gilbert_d2xy_r(int dst_idx, int cur_idx,
       di;
   int ax2, ay2, bx2, by2, w2, h2;
 
-  if (max_iter > 100000) { return -1; }
-  max_iter++;
-
   w = abs(ax + ay);
   h = abs(bx + by);
 
@@ -891,7 +886,7 @@ int main(int argc, char **argv) {
   }
 
   strncpy(buf, argv[1], 1023);
-  buf[1024]='\0';
+  buf[1023]='\0';
 
   w = atoi(argv[2]);
   h = atoi(argv[3]);
diff --git a/tests/runtests.sh b/tests/runtests.sh
index c3001aa..5cdab09 100755
--- a/tests/runtests.sh
+++ b/tests/runtests.sh
@@ -159,3 +159,6 @@ gilbert_cmp2 $x $y
 x=7 ; y=6 ; z=4
 gilbert_cmp3 $x $y $z
 
+x=490 ; y=490
+gilbert_cmp2 $x $y
+