diff --git a/source/blender/depsgraph/intern/builder/deg_builder.cc b/source/blender/depsgraph/intern/builder/deg_builder.cc
index 828da6cb056..7f62eb122db 100644
--- a/source/blender/depsgraph/intern/builder/deg_builder.cc
+++ b/source/blender/depsgraph/intern/builder/deg_builder.cc
@@ -52,14 +52,6 @@
 
 namespace DEG {
 
-string deg_fcurve_id_name(const FCurve *fcu)
-{
-	char index_buf[32];
-	// TODO(sergey): Use int-to-string utility or so.
-	BLI_snprintf(index_buf, sizeof(index_buf), "[%d]", fcu->array_index);
-	return string(fcu->rna_path) + index_buf;
-}
-
 static bool check_object_needs_evaluation(Object *object)
 {
 	if (object->recalc & OB_RECALC_ALL) {
diff --git a/source/blender/depsgraph/intern/builder/deg_builder.h b/source/blender/depsgraph/intern/builder/deg_builder.h
index 3cc51a2d7db..b8ea8c8e599 100644
--- a/source/blender/depsgraph/intern/builder/deg_builder.h
+++ b/source/blender/depsgraph/intern/builder/deg_builder.h
@@ -38,9 +38,6 @@ namespace DEG {
 
 struct Depsgraph;
 
-/* Get unique identifier for FCurves and Drivers */
-string deg_fcurve_id_name(const FCurve *fcu);
-
 void deg_graph_build_finalize(struct Depsgraph *graph);
 void deg_graph_build_flush_layers(struct Depsgraph *graph);