diff --git a/libcurvecpr/test/Makefile.am b/libcurvecpr/test/Makefile.am
index 03ce746..2804fae 100644
--- a/libcurvecpr/test/Makefile.am
+++ b/libcurvecpr/test/Makefile.am
@@ -1,3 +1,5 @@
+EXTRA_DIST = check_extras.h
+
 AM_CPPFLAGS = -I$(top_srcdir)/libcurvecpr/include -I$(top_srcdir)/libcurvecpr/test
 AM_CFLAGS = @CHECK_CFLAGS@
 LDADD = $(top_builddir)/libcurvecpr/lib/libcurvecpr.la @CHECK_LIBS@