diff --git a/src/xspice/icm/makedefs.in b/src/xspice/icm/makedefs.in
index a6d3bc4da..ffc488f30 100644
--- a/src/xspice/icm/makedefs.in
+++ b/src/xspice/icm/makedefs.in
@@ -65,6 +65,7 @@ prefix = @prefix@
 exec_prefix = @exec_prefix@
 libdir = @libdir@
 pkglibdir = $(libdir)/@PACKAGE@
+datarootdir = @datarootdir@
 datadir = @datadir@
 pkgdatadir = $(datadir)/@PACKAGE@