diff --git a/Userland/Libraries/LibGfx/ICC/WellKnownProfiles.h b/Userland/Libraries/LibGfx/ICC/WellKnownProfiles.h
index 40cb7f6427..17e2a0a5dc 100644
--- a/Userland/Libraries/LibGfx/ICC/WellKnownProfiles.h
+++ b/Userland/Libraries/LibGfx/ICC/WellKnownProfiles.h
@@ -12,6 +12,7 @@
 namespace Gfx::ICC {
 
 class Profile;
+class TagData;
 
 ErrorOr<NonnullRefPtr<Profile>> sRGB();