diff --git a/common/hw-gfx-gma-config.ads.template b/common/hw-gfx-gma-config.ads.template
index a2bc2e8..b438c40 100644
--- a/common/hw-gfx-gma-config.ads.template
+++ b/common/hw-gfx-gma-config.ads.template
@@ -275,7 +275,7 @@
      (not Haswell_On or else (CPU_Haswell and Is_ULX));
 
    ----------- GMBUS: -----------
-   Ungate_GMBUS_Unit_Level       : <genbool> := Skylake_On;
+   Ungate_GMBUS_Unit_Level       : <genbool> := Skylake_On and not Tigerlake_On;
    GMBUS_Alternative_Pins        : <genbool> := Gen_Broxton or Cannon_Point_On;
    Has_PCH_GMBUS                 : <genbool> := Ironlake_On;