diff --git a/make/makefile b/make/makefile
index b1384be..27f905f 100644
--- a/make/makefile
+++ b/make/makefile
@@ -93,16 +93,16 @@ install: compiler
 	@$(MKDIR_PARENT) $(DESTDIR)$(bindir)
 	$(INSTALL_PROGRAM) $(project_dir)/bin/oscar64 $(DESTDIR)$(bindir)
 	@$(MKDIR_PARENT) $(DESTDIR)$(includedir)/oscar64/{audio,c64,c128,cx16,gfx,nes,opp,plus4,vic20}
-	$(INSTALL_DATA) $(project_dir)/include/*.{h,c} $(DESTDIR)$(includedir)/oscar64
-	$(INSTALL_DATA) $(project_dir)/include/audio/*.{h,c} $(DESTDIR)$(includedir)/oscar64/audio
-	$(INSTALL_DATA) $(project_dir)/include/c64/*.{h,c} $(DESTDIR)$(includedir)/oscar64/c64
-	$(INSTALL_DATA) $(project_dir)/include/c128/*.{h,c} $(DESTDIR)$(includedir)/oscar64/c128
-	$(INSTALL_DATA) $(project_dir)/include/cx16/*.{h,c} $(DESTDIR)$(includedir)/oscar64/cx16
-	$(INSTALL_DATA) $(project_dir)/include/gfx/*.{h,c} $(DESTDIR)$(includedir)/oscar64/gfx
-	$(INSTALL_DATA) $(project_dir)/include/nes/*.{h,c} $(DESTDIR)$(includedir)/oscar64/nes
-	$(INSTALL_DATA) $(project_dir)/include/opp/*.{h,cpp} $(DESTDIR)$(includedir)/oscar64/opp
-	$(INSTALL_DATA) $(project_dir)/include/plus4/*.{h,c} $(DESTDIR)$(includedir)/oscar64/plus4
-	$(INSTALL_DATA) $(project_dir)/include/vic20/*.{h,c} $(DESTDIR)$(includedir)/oscar64/vic20
+	$(INSTALL_DATA) $(wildcard $(project_dir)/include/*.h $(project_dir)/include/*.c)             $(DESTDIR)$(includedir)/oscar64
+	$(INSTALL_DATA) $(wildcard $(project_dir)/include/audio/*.h $(project_dir)/include/audio/*.c) $(DESTDIR)$(includedir)/oscar64/audio
+	$(INSTALL_DATA) $(wildcard $(project_dir)/include/c64/*.h $(project_dir)/include/c64/*.c)     $(DESTDIR)$(includedir)/oscar64/c64
+	$(INSTALL_DATA) $(wildcard $(project_dir)/include/c128/*.h $(project_dir)/include/c128/*.c)   $(DESTDIR)$(includedir)/oscar64/c128
+	$(INSTALL_DATA) $(wildcard $(project_dir)/include/cx16/*.h $(project_dir)/include/cx16/*.c)   $(DESTDIR)$(includedir)/oscar64/cx16
+	$(INSTALL_DATA) $(wildcard $(project_dir)/include/gfx/*.h $(project_dir)/include/gfx/*.c)     $(DESTDIR)$(includedir)/oscar64/gfx
+	$(INSTALL_DATA) $(wildcard $(project_dir)/include/nes/*.h $(project_dir)/include/nes/*.c)     $(DESTDIR)$(includedir)/oscar64/nes
+	$(INSTALL_DATA) $(wildcard $(project_dir)/include/opp/*.h $(project_dir)/include/opp/*.cpp)   $(DESTDIR)$(includedir)/oscar64/opp
+	$(INSTALL_DATA) $(wildcard $(project_dir)/include/plus4/*.h $(project_dir)/include/plus4/c)   $(DESTDIR)$(includedir)/oscar64/plus4
+	$(INSTALL_DATA) $(wildcard $(project_dir)/include/vic20/*.h $(project_dir)/include/vic20/*.c) $(DESTDIR)$(includedir)/oscar64/vic20
 
 
 uninstall: