Index: obj_arc.c
===================================================================
--- obj_arc.c	(revision 31320)
+++ obj_arc.c	(revision 31321)
@@ -38,6 +38,7 @@
 #include "rotate.h"
 #include "move.h"
 #include "conf_core.h"
+#include "thermal.h"
 #include <librnd/core/compat_misc.h>
 #include "draw_wireframe.h"
 #include <librnd/core/hid_inlines.h>
@@ -481,6 +482,11 @@
 	return arc;
 }
 
+void *pcb_arcop_change_thermal(pcb_opctx_t *ctx, pcb_layer_t *ly, pcb_arc_t *arc)
+{
+	return pcb_anyop_change_thermal(ctx, (pcb_any_obj_t *)arc);
+}
+
 /* changes the size of an arc */
 void *pcb_arcop_change_size(pcb_opctx_t *ctx, pcb_layer_t *Layer, pcb_arc_t *Arc)
 {