diff --git a/src/drivers/intel/gma/gma.ads b/src/drivers/intel/gma/gma.ads
index e83fff4936..d264960d2b 100644
--- a/src/drivers/intel/gma/gma.ads
+++ b/src/drivers/intel/gma/gma.ads
@@ -8,7 +8,7 @@ package GMA is
 
    function read_edid
      (raw_edid :    out HW.GFX.EDID.Raw_EDID_Data;
-      Port     : in     Interfaces.C.int)
+      port     : in     Interfaces.C.int)
       return Interfaces.C.int
    with
       Export, Convention => C, External_Name => "gma_read_edid";