diff --git a/src/backends/native/meta-crtc-kms.c b/src/backends/native/meta-crtc-kms.c
index 7f0b6d302..baa3735bf 100644
--- a/src/backends/native/meta-crtc-kms.c
+++ b/src/backends/native/meta-crtc-kms.c
@@ -54,8 +54,6 @@ struct _MetaCrtcKms
   MetaKmsCrtc *kms_crtc;
 
   MetaKmsPlane *primary_plane;
-
-  gboolean is_gamma_valid;
 };
 
 static GQuark kms_crtc_crtc_kms_quark;
@@ -335,12 +333,6 @@ generate_crtc_connector_list (MetaGpu  *gpu,
   return connectors;
 }
 
-gboolean
-meta_crtc_kms_is_gamma_invalid (MetaCrtcKms *crtc_kms)
-{
-  return !crtc_kms->is_gamma_valid;
-}
-
 void
 meta_crtc_kms_set_mode (MetaCrtcKms   *crtc_kms,
                         MetaKmsUpdate *kms_update)
@@ -461,7 +453,6 @@ meta_crtc_kms_new (MetaGpuKms  *gpu_kms,
 
   crtc_kms->kms_crtc = kms_crtc;
   crtc_kms->primary_plane = primary_plane;
-  crtc_kms->is_gamma_valid = TRUE;
 
   if (!kms_crtc_crtc_kms_quark)
     {
diff --git a/src/backends/native/meta-crtc-kms.h b/src/backends/native/meta-crtc-kms.h
index ad7df5d85..8811947ba 100644
--- a/src/backends/native/meta-crtc-kms.h
+++ b/src/backends/native/meta-crtc-kms.h
@@ -65,8 +65,6 @@ gboolean
 meta_crtc_kms_supports_format (MetaCrtcKms *crtc_kms,
                                uint32_t     drm_format);
 
-gboolean meta_crtc_kms_is_gamma_invalid (MetaCrtcKms *crtc_kms);
-
 const MetaGammaLut * meta_crtc_kms_peek_gamma_lut (MetaCrtcKms *crtc_kms);
 
 MetaCrtcKms * meta_crtc_kms_from_kms_crtc (MetaKmsCrtc *kms_crtc);