diff --git a/src/gui/Makefile.am b/src/gui/Makefile.am
index 1ae12e70..4ae4731d 100644
--- a/src/gui/Makefile.am
+++ b/src/gui/Makefile.am
@@ -1,6 +1,6 @@
 AM_CPPFLAGS = -I$(top_srcdir)/include
 
 noinst_LIBRARIES = libgui.a
-libgui_a_SOURCES = sdlmain.cpp render.cpp render_support.h \
+libgui_a_SOURCES = sdlmain.cpp render.cpp render_normal.h render_scale2x.h \
 	midi.cpp midi_win32.h midi_oss.h