diff --git a/components/geckoport/each-version/nsXPCOM_std19.pas b/components/geckoport/each-version/nsXPCOM_std19.pas
index f65219c42..5e3cb33d1 100644
--- a/components/geckoport/each-version/nsXPCOM_std19.pas
+++ b/components/geckoport/each-version/nsXPCOM_std19.pas
@@ -3,7 +3,11 @@ unit nsXPCOM_std19;
 interface
 
 uses
-  nsGeckoStrings, nsTypes;
+  nsGeckoStrings,
+{$IFDEF Unix}
+  BaseUnix,
+{$ENDIF}
+  nsTypes;
 
 const
   NS_ISUPPORTS_STD19_IID: TGUID = '{00000000-0000-0000-c000-000000000046}';