diff --git a/demos/engines/rsaref/rsaref.ec b/demos/engines/rsaref/rsaref.ec
new file mode 100644
index 0000000000000000000000000000000000000000..c690ae3883bf7b6beaf6820d8ec3bb5dfbe242cc
--- /dev/null
+++ b/demos/engines/rsaref/rsaref.ec
@@ -0,0 +1,8 @@
+# configuration file for util/mkerr.pl
+#
+# use like this:
+#
+#	perl ../../../util/mkerr.pl -conf rsaref.ec \
+#		-nostatic -staticloader -write *.c
+
+L RSAREF	rsaref_err.h			rsaref_err.c