diff --git a/Fltk/GUI.cpp b/Fltk/GUI.cpp
index 1c6acacbe68f09dd0873c0b3d89ed52f22e2115d..c4a2f257be825e7b40ea4f3cf8a91efe0edef71e 100644
--- a/Fltk/GUI.cpp
+++ b/Fltk/GUI.cpp
@@ -35,6 +35,7 @@
 #include "Plugin.h"
 #include "PluginManager.h"
 #include "OpenFile.h"
+#include "Win32Icon.h"
 #include "Options.h"
 #include "Context.h"