diff --git a/packages/Makefile.defs.in b/packages/Makefile.defs.in
index 32975bfec..89317a83e 100644
--- a/packages/Makefile.defs.in
+++ b/packages/Makefile.defs.in
@@ -13,6 +13,7 @@ exec_prefix=@exec_prefix@
 srcdir=@abs_srcdir@/$(PACKAGE)
 bindir=@bindir@
 libdir=@libdir@
+datarootdir = @datarootdir@
 mandir=@mandir@
 
 SHELL=@SHELL@