diff --git a/test/geomechanics/el2p/Makefile.am b/test/geomechanics/el2p/Makefile.am
index 329f13ab408509ffe9d6d07f7896b1362d22bee3..71266fd819c1aed27faec67420a53a310a2e19f9 100644
--- a/test/geomechanics/el2p/Makefile.am
+++ b/test/geomechanics/el2p/Makefile.am
@@ -1,7 +1,7 @@
 check_PROGRAMS = test_el2p
 
 noinst_HEADERS = *.hh
-EXTRA_DIST= grids/*.dgf CMakeLists.txt
+EXTRA_DIST= grids/*.dgf co2values.inc CMakeLists.txt
 
 test_el2p_SOURCES = test_el2p.cc