diff --git a/widget/gtk/ScreenHelperGTK.cpp b/widget/gtk/ScreenHelperGTK.cpp
index e2dcf1e97ace..28586edb472d 100644
--- a/widget/gtk/ScreenHelperGTK.cpp
+++ b/widget/gtk/ScreenHelperGTK.cpp
@@ -287,7 +287,7 @@ static const struct wp_image_description_info_v1_listener
                                     image_description_info_target_max_cll,
                                     image_description_info_target_max_fall};
 
-static bool IsMonitorHDR(gint aMonitorNum) {
+bool IsMonitorHDR(gint aMonitorNum) {
   if (!WaylandDisplayGet() || !WaylandDisplayGet()->GetColorManager()) {
     return false;
   }
@@ -518,7 +518,7 @@ static already_AddRefed<Screen> MakeScreenGtk(GdkScreen* aScreen,
   bool isHDR = false;
 #ifdef MOZ_WAYLAND
   if (GdkIsWaylandDisplay()) {
-    isHDR = IsMonitorHDR(aMonitorNum);
+    isHDR = WaylandDisplayGet()->IsHDREnabled();
   }
 #endif