diff --git a/baseunits/uBaseUnit.pas b/baseunits/uBaseUnit.pas
index 38fa4c096..7c90db7d6 100644
--- a/baseunits/uBaseUnit.pas
+++ b/baseunits/uBaseUnit.pas
@@ -3568,6 +3568,7 @@ function RunExternalProcessAsAdmin(Exe, Params: String; ShowWind: Boolean;
   {$ENDIF}
 end;
 
+{$ifdef windows}
 function WinRunProcessA(Exe, Params: string; ShowWind: Boolean; isPersistent: Boolean): Boolean;
 var
   SEInfo: TSHELLEXECUTEINFOA;
@@ -3615,6 +3616,7 @@ function WinRunProcessW(Exe, Params: string; ShowWind: Boolean; isPersistent: Bo
   if isPersistent then
     WaitForSingleObject(SEInfo.hProcess, INFINITE);
 end;
+{$endif}
 
 function RunExternalProcess(Exe: String; Params: array of string;
   ShowWind: Boolean; isPersistent: Boolean): Boolean;