diff --git a/source/lib/talloc/configure.in b/source/lib/talloc/configure.in
index 6cd620d9064..fc526797375 100644
--- a/source/lib/talloc/configure.in
+++ b/source/lib/talloc/configure.in
@@ -1,5 +1,6 @@
 AC_PREREQ(2.50)
 AC_INIT(talloc.h)
+AC_SUBST(datarootdir)
 AC_PROG_CC
 if test "x$GCC" = "xyes"; then
 	CFLAGS="$CFLAGS -Wall -W"