diff --git a/tools/tiff2ps.c b/tools/tiff2ps.c
index 82a5d84..776ad2c 100644
--- a/tools/tiff2ps.c
+++ b/tools/tiff2ps.c
@@ -3030,7 +3030,7 @@ tsize_t Ascii85EncodeBlock( uint8 * ascii85_p, unsigned f_eod, const uint8 * raw
      * If requested add an ASCII85 End Of Data marker:
      */
 
-    if ( f_eod )
+    if ( ascii85_p && (f_eod ))
     {
         ascii85_p[ascii85_l++] = '~';
         ascii85_p[ascii85_l++] = '>';
diff --git a/tools/tiffcrop.c b/tools/tiffcrop.c
index 722b132..470a18d 100644
--- a/tools/tiffcrop.c
+++ b/tools/tiffcrop.c
@@ -958,7 +958,6 @@ static int readContigTilesIntoBuffer (TIFF* in, uint8* buf,
 		     return 1;
 	    }
           }
-        prev_trailing_bits += trailing_bits;
         /* if (prev_trailing_bits > 7) */
 	/*   prev_trailing_bits-= 8; */
 	}