--- Makefile.in.orig	2016-09-03 19:34:06 UTC
+++ Makefile.in
@@ -38,7 +38,7 @@ IRCDLIBS=@IRCDLIBS@ @TRE_LIBS@ @CARES_LI
 CRYPTOLIB=@CRYPTOLIB@
 OPENSSLINCLUDES=
 
-XCFLAGS=@TRE_CFLAGS@ @CARES_CFLAGS@ @CFLAGS@
+XCFLAGS=-I@TREINCDIR@ @TRE_CFLAGS@ @CFLAGS@
 #
 # use the following on MIPS:
 #CFLAGS= -systype bsd43 -DSYSTYPE_BSD43 -I$(INCLUDEDIR)