diff --git a/common/broxton/hw-gfx-gma-plls.adb b/common/broxton/hw-gfx-gma-plls.adb
index 087ff12..6093320 100644
--- a/common/broxton/hw-gfx-gma-plls.adb
+++ b/common/broxton/hw-gfx-gma-plls.adb
@@ -398,6 +398,8 @@
 
    ----------------------------------------------------------------------------
 
+   procedure Initialize is null;
+
    procedure Alloc
      (Port_Cfg : in     Port_Config;
       PLL      :    out T;
diff --git a/common/broxton/hw-gfx-gma-plls.ads b/common/broxton/hw-gfx-gma-plls.ads
index d79d378..af957fb 100644
--- a/common/broxton/hw-gfx-gma-plls.ads
+++ b/common/broxton/hw-gfx-gma-plls.ads
@@ -24,7 +24,7 @@
    type T is (Invalid_PLL, DPLL_A, DPLL_B, DPLL_C);
    Invalid : constant T := Invalid_PLL;
 
-   procedure Initialize is null
+   procedure Initialize
    with
       Global => (Output => State);