diff --git a/tools/testing/selftests/net/tcp_ao/config b/tools/testing/selftests/net/tcp_ao/config
index 971cb6fa2d63..f22148512365 100644
--- a/tools/testing/selftests/net/tcp_ao/config
+++ b/tools/testing/selftests/net/tcp_ao/config
@@ -1,3 +1,4 @@
+CONFIG_CRYPTO_CMAC=y
 CONFIG_CRYPTO_HMAC=y
 CONFIG_CRYPTO_RMD160=y
 CONFIG_CRYPTO_SHA1=y