Index: trunk/src/plug_io.c
===================================================================
--- trunk/src/plug_io.c	(revision 8095)
+++ trunk/src/plug_io.c	(revision 8096)
@@ -316,7 +316,7 @@
 	return res;
 }
 
-int pcb_write_font(pcb_font_t *Ptr, char *Filename, const char *fmt)
+int pcb_write_font(pcb_font_t *Ptr, const char *Filename, const char *fmt)
 {
 	int res, newfmt = 0;
 	pcb_plug_io_t *p = find_writer(PCB_IOT_FONT, fmt);
Index: trunk/src/plug_io.h
===================================================================
--- trunk/src/plug_io.h	(revision 8095)
+++ trunk/src/plug_io.h	(revision 8096)
@@ -110,7 +110,7 @@
 int pcb_parse_font(pcb_font_t *Ptr, const char *Filename);
 int pcb_write_buffer(FILE *f, pcb_buffer_t *buff, const char *fmt);
 int pcb_write_element_data(FILE *f, pcb_data_t *e, const char *fmt);
-int pcb_write_font(pcb_font_t *Ptr, char *Filename, const char *fmt);
+int pcb_write_font(pcb_font_t *Ptr, const char *Filename, const char *fmt);
 
 /********** common function used to be part of file.[ch] and friends **********/
 FILE *pcb_check_and_open_file(const char *, pcb_bool, pcb_bool, pcb_bool *, pcb_bool *);