diff --git a/src/utils/readfile.cpp b/src/utils/readfile.cpp
index 51ff180c..e146ae5e 100644
--- a/src/utils/readfile.cpp
+++ b/src/utils/readfile.cpp
@@ -268,7 +268,7 @@ int main(int argc, const char **argv)
       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;