diff --git a/components/ideintf/lazideintf.pas b/components/ideintf/lazideintf.pas
index 41b0407fa2..f54f5bd092 100644
--- a/components/ideintf/lazideintf.pas
+++ b/components/ideintf/lazideintf.pas
@@ -248,7 +248,7 @@ type
                               ShowDialog: boolean): TModalResult; virtual; abstract;
     function DoBuildProject(const AReason: TCompileReason;
                             Flags: TProjectBuildFlags;
-                            FinalizeResources: boolean): TModalResult; virtual; abstract;
+                            FinalizeResources: boolean = True): TModalResult; virtual; abstract;
     function GetProjectFileForProjectEditor(AEditor: TSourceEditorInterface): TLazProjectFile; virtual; abstract;
     function DoCallProjectChangedHandler(HandlerType: TLazarusIDEHandlerType;
                                          AProject: TLazProject): TModalResult;