--- Make.common.in.orig	Tue Apr  2 09:00:00 1996
+++ Make.common.in	Sat Dec  7 17:08:14 1996
@@ -42,6 +42,7 @@
 
 # Flags & libs
 # cannot use := to append (except GNU make), so do it this way.
+XINC = $(prefix)/include -I..
 XCFLAGS = @CFLAGS@
 XCPPFLAGS = @CPPFLAGS@ $(XINC)
 XLDFLAGS = @LDFLAGS@