diff --git a/components/onlinepackagemanager/opkman_updates.pas b/components/onlinepackagemanager/opkman_updates.pas
index c00b589dcf..18ba1e2622 100644
--- a/components/onlinepackagemanager/opkman_updates.pas
+++ b/components/onlinepackagemanager/opkman_updates.pas
@@ -34,9 +34,13 @@ uses
   // LazUtils
   Laz2_XMLCfg,
   // OpkMan
-  opkman_serializablepackages, opkman_options, opkman_common, opkman_const,
-  {$IFDEF FPC311}fphttpclient{$ELSE}opkman_httpclient{$ENDIF},
-  {$IFDEF FPC311}zipper{$ELSE}opkman_zip{$ENDIF};
+  opkman_serializablepackages, opkman_options, opkman_common,
+  {$IFDEF MSWINDOWS}
+    opkman_const,
+    {$IFDEF FPC311}zipper,{$ELSE}opkman_zip,{$ENDIF}
+  {$ENDIF}
+  {$IFDEF FPC311}fphttpclient{$ELSE}opkman_httpclient{$ENDIF}
+  ;
 
 const
   OpkVersion = 1;