diff --git a/src/polyid.c b/src/polyid.c
index fa9a3fd..478bb57 100644
--- a/src/polyid.c
+++ b/src/polyid.c
@@ -11,7 +11,7 @@
 #include "defaults.h"
 
 /* getopt options */
-const char *optstr = "dqu:p:P:W0";
+const char *optstr = "dqu:p:P:W0i:";
 
 /* allocate polygons as a global array */
 polygon *poly_global[NPOLYSMAX];
diff --git a/src/rwbinpoly.c b/src/rwbinpoly.c
index e4302c0..50a67fb 100644
--- a/src/rwbinpoly.c
+++ b/src/rwbinpoly.c
@@ -167,6 +167,7 @@ int wr_bin_poly(char *filename, format *fmt, int npolys, polygon *polys[/*npolys
         fwrite(polys[ipoly]->rp, sizeof(vec), ph.np, file);
         fwrite(polys[ipoly]->cm, sizeof(long double), ph.np, file);
       }
+    npoly = npolys;
 
   /* warn about polygons with incorrect area */
   if (nbadarea > 0) {