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--- a/src/utils/readfile.cpp
+++ b/src/utils/readfile.cpp
@@ -268,7 +268,7 @@
       case 'c':	op_flags |= OPT_c; if (argc < 2)  Usage();
 	  cnt = atol(*(++argv)); argc--; 
 	goto b1;
-      case 'o':	op_flags |= OPT_c; if (argc < 2)  Usage();
+      case 'o':	op_flags |= OPT_o; if (argc < 2)  Usage();
 	  offs = strtoul(*(++argv), 0, 0); argc--; 
 	goto b1;
       default: Usage();	break;