diff --git a/source/blender/blenkernel/BKE_screen.h b/source/blender/blenkernel/BKE_screen.h
index 0eeccf71cc6..bcc58ecf2c5 100644
--- a/source/blender/blenkernel/BKE_screen.h
+++ b/source/blender/blenkernel/BKE_screen.h
@@ -436,7 +436,7 @@ void BKE_screen_foreach_id_screen_area(struct LibraryForeachIDData *data, struct
 void BKE_screen_free(struct bScreen *screen);
 void BKE_screen_area_map_free(struct ScrAreaMap *area_map) ATTR_NONNULL();
 
-struct ScrEdge *BKE_screen_find_edge(struct bScreen *screen,
+struct ScrEdge *BKE_screen_find_edge(const struct bScreen *screen,
                                      struct ScrVert *v1,
                                      struct ScrVert *v2);
 void BKE_screen_sort_scrvert(struct ScrVert **v1, struct ScrVert **v2);
diff --git a/source/blender/blenkernel/intern/screen.c b/source/blender/blenkernel/intern/screen.c
index 1a35340d7fc..e68354dbede 100644
--- a/source/blender/blenkernel/intern/screen.c
+++ b/source/blender/blenkernel/intern/screen.c
@@ -694,7 +694,7 @@ void BKE_screen_free(bScreen *screen)
 
 /* ***************** Screen edges & verts ***************** */
 
-ScrEdge *BKE_screen_find_edge(bScreen *screen, ScrVert *v1, ScrVert *v2)
+ScrEdge *BKE_screen_find_edge(const bScreen *screen, ScrVert *v1, ScrVert *v2)
 {
   ScrEdge *se;