diff --git a/src/citron/uisettings.h b/src/citron/uisettings.h
index 6aece0855..7dcd66ab8 100644
--- a/src/citron/uisettings.h
+++ b/src/citron/uisettings.h
@@ -37,6 +37,7 @@ namespace Settings {
 namespace UISettings {
 
     bool IsDarkTheme();
+    bool IsGamescope();
 
     struct ContextualShortcut {
         std::string keyseq;