diff --git a/common/haswell_shared/hw-gfx-gma-ddi_phy_stub.ads b/common/haswell_shared/hw-gfx-gma-ddi_phy_stub.ads
index b37e955..6099c50 100644
--- a/common/haswell_shared/hw-gfx-gma-ddi_phy_stub.ads
+++ b/common/haswell_shared/hw-gfx-gma-ddi_phy_stub.ads
@@ -27,7 +27,7 @@
      (Port        : Digital_Port;
       Train_Set   : DP_Info.Train_Set) is null;
 
-   type HDMI_Buf_Trans_Range is range 0 .. 9;
+   subtype HDMI_Buf_Trans_Range is DDI_HDMI_Buf_Trans_Range;
    procedure Set_HDMI_Signal_Levels
      (Port  : DDI_Phy_Port;
       Level : HDMI_Buf_Trans_Range) is null;