diff --git a/src/slic3r/GUI/PluginsDialog.hpp b/src/slic3r/GUI/PluginsDialog.hpp
index 98b46cf3e3..ec68d12969 100644
--- a/src/slic3r/GUI/PluginsDialog.hpp
+++ b/src/slic3r/GUI/PluginsDialog.hpp
@@ -2,6 +2,7 @@
 #define slic3r_PluginsDialog_hpp_
 
 #include "Widgets/WebViewHostDialog.hpp"
+#include "Widgets/ProgressDialog.hpp"
 #include "PluginSource.hpp"
 #include "PluginStatus.hpp"
 #include "PluginSort.hpp"