diff --git a/Userland/Libraries/LibPDF/ColorSpace.h b/Userland/Libraries/LibPDF/ColorSpace.h
index 79e0062d76..63f3cfd996 100644
--- a/Userland/Libraries/LibPDF/ColorSpace.h
+++ b/Userland/Libraries/LibPDF/ColorSpace.h
@@ -25,7 +25,7 @@
 
 namespace PDF {
 
-class Page;
+struct Page;
 
 class ColorSpace : public RefCounted<ColorSpace> {
 public: