diff --git a/configs/freedom-k64f/netnsh/defconfig b/configs/freedom-k64f/netnsh/defconfig
index 5c002315e5..d74aed47ea 100644
--- a/configs/freedom-k64f/netnsh/defconfig
+++ b/configs/freedom-k64f/netnsh/defconfig
@@ -255,6 +255,7 @@ CONFIG_KINETIS_ENETNTXBUFFERS=2
 # CONFIG_KINETIS_ENETUSEMII is not set
 CONFIG_KINETIS_ENET_MDIOPULLUP=y
 # CONFIG_KINETIS_ENET_NORXER is not set
+CONFIG_KINETIS_EMAC_RMIICLKEXTAL=y
 CONFIG_KINETIS_EMAC_HPWORK=y
 
 #