--- a/src/common/cstr.h
+++ b/src/common/cstr.h
@@ -56,7 +56,8 @@
 DEF_CSTR(plus, "+");
 DEF_CSTR(textplain, "text/plain");
 DEF_CSTR(url, "url");
-
+// Marker for HTML format fields
+DEF_CSTR(fldhtm, "\007");
 
 // Values used as keys inside Dijon::Filter::metaData[]. This structure is 
 // used to store all data generated by format-translating filters. It is