Index: b/apngopt.cpp
===================================================================
--- a/apngopt.cpp
+++ b/apngopt.cpp
@@ -33,7 +33,6 @@
 #include <vector>
 #include "png.h"     /* original (unpatched) libpng is ok */
 #include "zlib.h"
-#include "7z.h"
 extern "C" {
 #include "zopfli.h"
 }
@@ -958,8 +957,6 @@ void deflate_rect_fin(int deflate_method
   if (deflate_method == 1)
   {
     unsigned size = zbuf_size;
-    compress_rfc1950_7z(rows, op[n].h*(rowbytes + 1), zbuf, size, iter<100 ? iter : 100, 255);
-    *zsize = size;
   }
   else
   {
@@ -1438,8 +1435,7 @@ int main(int argc, char** argv)
   if (argc <= 1)
   {
     printf("\n\nUsage: apngopt [options] anim.png [anim_opt.png]\n\n"
-           "-z0  : zlib compression\n"
-           "-z1  : 7zip compression (default)\n"
+           "-z0  : zlib compression (default)\n"
            "-z2  : zopfli compression\n"
            "-i## : number of iterations, default -i%d\n", iter);
     return 1;
@@ -1459,7 +1455,7 @@ int main(int argc, char** argv)
         if (szOpt[2] == '0')
           deflate_method = 0;
         if (szOpt[2] == '1')
-          deflate_method = 1;
+          deflate_method = 0;
         if (szOpt[2] == '2')
           deflate_method = 2;
       }