Index: src/marclib.hxx
--- src/marclib.hxx.orig
+++ src/marclib.hxx
@@ -60,7 +60,7 @@ void codeconvert(char *string);
 char charconvert(char c);
 int subfcopy(char *To, char *From,int flag);
 int tagcmp(char *pattag, char *comptag);
-MARC_FIELD *GetField(MARC_REC *rec,MARC_FIELD *startf,char *buffer,char *tag);
+MARC_FIELD *GetField(MARC_REC *rec,MARC_FIELD *startf,char *buffer,const char *tag);
 MARC_SUBFIELD *GetSubf(MARC_FIELD *f, char *buffer, char code);
 char *normalize(char *in, char *out);
 /*