diff --git a/libtransmission/Makefile.am b/libtransmission/Makefile.am
index 425d774f0..dea667bdf 100644
--- a/libtransmission/Makefile.am
+++ b/libtransmission/Makefile.am
@@ -195,8 +195,7 @@ clients_test_SOURCES = clients-test.c $(TEST_SOURCES)
 clients_test_LDADD = ${apps_ldadd}
 clients_test_LDFLAGS = ${apps_ldflags}
 
-crypto_test_SOURCES = crypto-test.c $(TEST_SOURCES)
-crypto_test_HEADERS = crypto-test-ref.h
+crypto_test_SOURCES = crypto-test.c crypto-test-ref.h $(TEST_SOURCES)
 crypto_test_LDADD = ${apps_ldadd}
 crypto_test_LDFLAGS = ${apps_ldflags}