Index: trunk/src/plug_import.c
===================================================================
--- trunk/src/plug_import.c	(revision 29511)
+++ trunk/src/plug_import.c	(revision 29512)
@@ -100,7 +100,7 @@
 }
 
 
-int pcb_import(pcb_hidlib_t *hidlib, char *filename, unsigned int aspect)
+int pcb_import(pcb_hidlib_t *hidlib, const char *filename, unsigned int aspect)
 {
 	pcb_plug_import_t *plug;
 	FILE *fp;
@@ -128,7 +128,7 @@
 	return plug->import(plug, aspect, &filename, 1);
 }
 
-int pcb_import_netlist(pcb_hidlib_t *hidlib, char *filename)
+int pcb_import_netlist(pcb_hidlib_t *hidlib, const char *filename)
 {
 	return pcb_import(hidlib, filename, IMPORT_ASPECT_NETLIST);
 }
Index: trunk/src/plug_import.h
===================================================================
--- trunk/src/plug_import.h	(revision 29511)
+++ trunk/src/plug_import.h	(revision 29512)
@@ -70,8 +70,8 @@
 pcb_plug_import_t *pcb_lookup_importer(const char *name);
 
 /********** hook wrappers **********/
-int pcb_import(pcb_hidlib_t *hidlib, char *filename, unsigned int aspect);
-int pcb_import_netlist(pcb_hidlib_t *, char *);
+int pcb_import(pcb_hidlib_t *hidlib, const char *filename, unsigned int aspect);
+int pcb_import_netlist(pcb_hidlib_t *hidlib, const char *fn);
 
 /*** macros used by import plugins ***/