--- a/Makefile.in
+++ b/Makefile.in
@@ -79,7 +79,7 @@ screen: $(OFILES)
 	$(CC) $(LDFLAGS) -o $@ $(OFILES) $(LIBS)
 
 .c.o:
-	$(CC) -c -I. -I$(srcdir) $(M_CFLAGS) $(CPPFLAGS) $(DEFS) \
+	$(CC) -c $(M_CFLAGS) $(CPPFLAGS) $(DEFS) \
 	    $(OPTIONS) $(CFLAGS) $<
 
 install_bin: .version screen
