diff --git a/common/haswell/hw-gfx-gma-power_and_clocks.ads b/common/haswell/hw-gfx-gma-power_and_clocks.ads
index e4f2611..f7c5abe 100644
--- a/common/haswell/hw-gfx-gma-power_and_clocks.ads
+++ b/common/haswell/hw-gfx-gma-power_and_clocks.ads
@@ -32,6 +32,7 @@
    procedure Enable_CDClk is null;
 
    procedure Power_Set_To (Configs : Pipe_Configs);
+   procedure Power_Up (Port : Active_Port_Type; Success : out Boolean);
    procedure Power_Up (Old_Configs, New_Configs : Pipe_Configs);
    procedure Power_Down (Old_Configs, Tmp_Configs, New_Configs : Pipe_Configs);