diff --git a/3rdparty/ocornut-imgui/widgets/gizmo.h b/3rdparty/ocornut-imgui/widgets/gizmo.h
index 14bf929b9..d40dd3453 100644
--- a/3rdparty/ocornut-imgui/widgets/gizmo.h
+++ b/3rdparty/ocornut-imgui/widgets/gizmo.h
@@ -1,3 +1,5 @@
+// https://github.com/CedricGuillemet/ImGuizmo
+
 namespace ImGuizmo
 {
 	// call BeginFrame right after ImGui_XXXX_NewFrame();
diff --git a/3rdparty/ocornut-imgui/widgets/gizmo.inl b/3rdparty/ocornut-imgui/widgets/gizmo.inl
index f6148ad7d..51c286b8f 100644
--- a/3rdparty/ocornut-imgui/widgets/gizmo.inl
+++ b/3rdparty/ocornut-imgui/widgets/gizmo.inl
@@ -1,3 +1,5 @@
+// https://github.com/CedricGuillemet/ImGuizmo
+
 namespace ImGuizmo
 {
 	const float ZPI = 3.14159265358979323846f;