--- makefile.in.orig	2010-08-04 10:17:08.111538500 +0200
+++ makefile.in	2010-08-04 10:18:21.806977166 +0200
@@ -36,7 +36,7 @@
 LINT		= @LINT@
 
 LIBS		= @LIBS@
-CPPFLAGS	= @CPPFLAGS@ -DHAVE_CONFIG_H -DRELEASE=\"$(RELEASE)\" -DADD_HELPFILE=\"$(datadir)/$(ACTUAL).hlp\" -I. -I$(srcdir)
+CPPFLAGS	= @CPPFLAGS@ -DHAVE_CONFIG_H -DRELEASE=\"$(RELEASE)\" -DADD_HELPFILE=\"@prefix@/share/add/$(ACTUAL).hlp\" -I. -I$(srcdir)
 CFLAGS		= @CFLAGS@ @EXTRA_CFLAGS@
 LDFLAGS		= @LDFLAGS@