tests/modetest: fix distcheck

diff --git a/tests/modetest/Makefile.am b/tests/modetest/Makefile.am
index 35754a2..b5ec771 100644 (file)
--- a/tests/modetest/Makefile.am
+++ b/tests/modetest/Makefile.am
@@ -8,7 +8,8 @@ noinst_PROGRAMS = \
        modetest
 
 modetest_SOURCES = \
-       buffers.c modetest.c
+       buffers.c modetest.c buffers.h
+
 modetest_LDADD = \
        $(top_builddir)/libdrm.la \
        $(top_builddir)/libkms/libkms.la \