diff --git a/src/layout/IHyprLayout.hpp b/src/layout/IHyprLayout.hpp
index b5926a07..e168556e 100644
--- a/src/layout/IHyprLayout.hpp
+++ b/src/layout/IHyprLayout.hpp
@@ -4,6 +4,7 @@
 #include <any>
 
 class CWindow;
+class CGradientValueData;
 
 struct SWindowRenderLayoutHints {
     bool                isBorderGradient = false;