diff --git a/Makefile.in b/Makefile.in
index 6544cbd625..77b2e0cf23 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -31949,6 +31949,15 @@ sound_sdl_sound_sdl.o: $(srcdir)/src/unix/sound_sdl.cpp
 	$(CXXC) -c -o $@ $(SOUND_SDL_CXXFLAGS) $(srcdir)/src/unix/sound_sdl.cpp
 
 
+$(srcdir)/include/wx/stc/stc.h: \
+$(srcdir)/src/stc/scintilla/include/Scintilla.iface \
+$(srcdir)/src/stc/stc.cpp.in \
+$(srcdir)/src/stc/stc.h.in \
+$(srcdir)/src/stc/gen_iface.py
+	cd $(srcdir)/src/stc && ./gen_iface.py
+monolib_stc.o monodll_stc.o stcdll_stc.o stclib_stc.o: \
+$(srcdir)/include/wx/stc/stc.h
+
 #
 # "make dist" target implementation:
 #
diff --git a/build/bakefiles/scintilla.bkl b/build/bakefiles/scintilla.bkl
index a64a2a2484..604b5ea64d 100644
--- a/build/bakefiles/scintilla.bkl
+++ b/build/bakefiles/scintilla.bkl
@@ -15,6 +15,18 @@
         $(TOP_SRCDIR)src/stc/scintilla/include
     </set>
 
+    <!-- automatically update generated files -->
+    <fragment format='autoconf'>
+$(srcdir)/include/wx/stc/stc.h: \
+$(srcdir)/src/stc/scintilla/include/Scintilla.iface \
+$(srcdir)/src/stc/stc.cpp.in \
+$(srcdir)/src/stc/stc.h.in \
+$(srcdir)/src/stc/gen_iface.py
+	cd $(srcdir)/src/stc &amp;&amp; ./gen_iface.py
+monolib_stc.o monodll_stc.o stcdll_stc.o stclib_stc.o: \
+$(srcdir)/include/wx/stc/stc.h
+    </fragment>
+
     <lib id="wxscintilla" template="3rdparty_lib"
          cond="USE_STC=='1' and BUILDING_LIB=='1'">
         <include>$(TOP_SRCDIR)src/stc/scintilla/include</include>