diff --git a/common/hw-gfx-gma-config.ads.template b/common/hw-gfx-gma-config.ads.template
index 339b429..5d136b2 100644
--- a/common/hw-gfx-gma-config.ads.template
+++ b/common/hw-gfx-gma-config.ads.template
@@ -251,7 +251,7 @@
    -- Maximum source width with enabled scaler. This only accounts
    -- for simple 1:1 pipe:scaler mappings.
 
-   type Width_Per_Pipe is array (Pipe_Index) of Width_Type;
+   type Width_Per_Pipe is array (Pipe_Index) of Pos16;
 
    Maximum_Scalable_Width : constant Width_Per_Pipe :=
      (case CPU is