$OpenBSD: patch-src_fe-common_core_Makefile_in,v 1.9 2016/04/09 21:48:55 sthen Exp $
--- src/fe-common/core/Makefile.in.orig	Tue Mar 22 23:25:27 2016
+++ src/fe-common/core/Makefile.in	Sat Apr  9 22:44:36 2016
@@ -377,7 +377,7 @@ AM_CPPFLAGS = \
 	-I$(top_srcdir)/src -I$(top_srcdir)/src/core/ \
 	$(GLIB_CFLAGS) \
 	-DHELPDIR=\""$(datadir)/irssi/help"\" \
-	-DTHEMESDIR=\""$(datadir)/irssi/themes"\"
+	-DTHEMESDIR=\""$(sysconfdir)/irssi/themes"\"
 
 libfe_common_core_a_SOURCES = \
 	chat-completion.c \
