diff --git a/w2v-server.pl b/w2v-server.pl
index 5a24fdb..dc115a3 100644
--- a/w2v-server.pl
+++ b/w2v-server.pl
@@ -104,7 +104,7 @@
 	unsigned long upto;
 } knnpars;
 
-float *M, *syn1neg_window, *expTable;
+float *M, *M2, *syn1neg_window, *expTable;
 char *vocab;
 
 long long words, size;
@@ -181,14 +181,14 @@
     if( (net_fd = open(net_name, O_RDONLY)) >= 0) {
       window = (lseek(net_fd, 0, SEEK_END) -  sizeof(float) * words * size) / words / size / sizeof(float) / 2;
       //      lseek(net_fd, sizeof(float) * words * size, SEEK_SET);
-      munmap(M,  sizeof(float) * words * size);
-      M = mmap(0, sizeof(float) * words * size + sizeof(float) * 2 * window * size * words, PROT_READ, MAP_SHARED, net_fd, 0);
+      // munmap(M,  sizeof(float) * words * size);
+      M2 = mmap(0, sizeof(float) * words * size + sizeof(float) * 2 * window * size * words, PROT_READ, MAP_SHARED, net_fd, 0);
       if (M == MAP_FAILED) {
         close(net_fd);
         fprintf(stderr, "Cannot mmap %s\n", net_name);
         exit(-1);
       }
-      syn1neg_window =  M + words * size;
+      syn1neg_window =  M2 + words * size;
     } else {
       fprintf(stderr, "Cannot open %s\n", net_name);
       exit(-1);
@@ -252,7 +252,7 @@
           continue;
         f = 0;
         for (c = 0; c < size; c++)
-          f += M[d* size + c]	* syn1neg_window[target * window_layer_size	+ window_offset + c];
+          f += M2[d* size + c]	* syn1neg_window[target * window_layer_size	+ window_offset + c];
         if (f < -MAX_EXP)
           continue;
         else if (f > MAX_EXP)