1 files changed, 3 insertions, 3 deletions
diff --git a/zcmp.cc b/zcmp.cc
index 8f362c3..3522329 100644
--- a/zcmp.cc
+++ b/zcmp.cc
@@ -246,12 +246,12 @@ int cmp( const long long max_size, const int infd[2],
         }
       }
 
-    buffer0[rd[0]] = ~buffer1[rd[0]];	// sentinels for the block compare
-    buffer1[rd[1]] = ~buffer0[rd[1]];
+    const int min_rd = std::min( rd[0], rd[1] );
+    buffer0[min_rd] = 0;		// sentinels for the block compare
+    buffer1[min_rd] = 1;
 
     int first_diff = block_compare( buffer0, buffer1, &line_number );
     byte_number += first_diff;
-    const int min_rd = std::min( rd[0], rd[1] );
 
     if( first_diff < min_rd )
       {