Index: trunk/src/layer.c
===================================================================
--- trunk/src/layer.c	(revision 19668)
+++ trunk/src/layer.c	(revision 19669)
@@ -1149,7 +1149,7 @@
 	return *cache;
 }
 
-pcb_layer_id_t pcb_layer_get_bottom_silk()
+pcb_layer_id_t pcb_layer_get_bottom_silk(void)
 {
 	static pcb_layer_id_t cache = -1;
 	pcb_layer_id_t id = pcb_layer_get_cached(PCB, &cache, PCB_LYT_BOTTOM, PCB_LYT_SILK);
@@ -1157,7 +1157,7 @@
 	return id;
 }
 
-pcb_layer_id_t pcb_layer_get_top_silk()
+pcb_layer_id_t pcb_layer_get_top_silk(void)
 {
 	static pcb_layer_id_t cache = -1;
 	pcb_layer_id_t id = pcb_layer_get_cached(PCB, &cache, PCB_LYT_TOP, PCB_LYT_SILK);
Index: trunk/src/layer.h
===================================================================
--- trunk/src/layer.h	(revision 19668)
+++ trunk/src/layer.h	(revision 19669)
@@ -172,8 +172,8 @@
 } pcb_side_t;
 
 /* Cached lookup of the first silk layer in the bottom or top group */
-pcb_layer_id_t pcb_layer_get_bottom_silk();
-pcb_layer_id_t pcb_layer_get_top_silk();
+pcb_layer_id_t pcb_layer_get_bottom_silk(void);
+pcb_layer_id_t pcb_layer_get_top_silk(void);
 
 /* Return the board the layer is under */
 #define pcb_layer_get_top(layer) pcb_data_get_top((layer)->parent.data)