diff --git a/mex/sources/Makefile.am b/mex/sources/Makefile.am
index d224c614c15fa1d46df413405d77f1cce797b55f..95ef96e5b004d146aeff157ea0905af165d92929 100644
--- a/mex/sources/Makefile.am
+++ b/mex/sources/Makefile.am
@@ -10,7 +10,8 @@ EXTRA_DIST = \
 	qzcomplex \
 	k_order_perturbation \
 	ordschur \
-	libslicot
+	libslicot \
+	kalman_steady_state
 
 clean-local:
 	rm -rf `find mex/sources -name *.o`