diff --git a/tests/Makefile.am b/tests/Makefile.am
index 9b72796f0..9c3afcd0d 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -1,6 +1,6 @@
 ## Process this file with automake to produce Makefile.in
 
-SUBDIRS = resistance filters polezero
+SUBDIRS = resistance filters polezero bsim3soipd
 
 TESTS = \
 	diffpair.cir		\