diff --git a/subsys/bluetooth/controller/ll_sw/lll_df.h b/subsys/bluetooth/controller/ll_sw/lll_df.h
index c9c3a2fd340..7229c50bbb1 100644
--- a/subsys/bluetooth/controller/ll_sw/lll_df.h
+++ b/subsys/bluetooth/controller/ll_sw/lll_df.h
@@ -4,26 +4,5 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-/* @brief Configuration of Constant Tone Extension for connectionless
- * transmission.
- */
-struct lll_df_adv_cfg {
-	uint8_t is_enabled:1;
-	uint8_t cte_length:6;   /* Length of CTE in 8us units */
-	uint8_t cte_type:2;
-	uint8_t cte_count:6;
-	uint8_t ant_sw_len:6;
-	uint8_t ant_ids[CONFIG_BT_CTLR_DF_MAX_ANT_SW_PATTERN_LEN];
-};
-
-/* @brief Min supported length of antenna switching pattern */
-#define LLL_DF_MIN_ANT_PATTERN_LEN 3
-
-/* @brief Max supported CTE length in 8us units */
-#define LLL_DF_MAX_CTE_LEN 20
-
 int lll_df_init(void);
 int lll_df_reset(void);
-
-/* Provides number of available antennas for Direction Finding */
-uint8_t lll_df_ant_num_get(void);
diff --git a/subsys/bluetooth/controller/ll_sw/lll_df_internal.h b/subsys/bluetooth/controller/ll_sw/lll_df_internal.h
new file mode 100644
index 00000000000..06a131dd0ad
--- /dev/null
+++ b/subsys/bluetooth/controller/ll_sw/lll_df_internal.h
@@ -0,0 +1,29 @@
+/*
+ * Copyright (c) 2020 Nordic Semiconductor ASA
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+/* @brief Configuration of Constant Tone Extension for connectionless
+ * transmission.
+ */
+struct lll_df_adv_cfg {
+	uint8_t is_enabled:1;
+	uint8_t is_started:1;
+	uint8_t cte_length:6;   /* Length of CTE in 8us units */
+	uint8_t cte_type:2;
+	uint8_t cte_count:6;
+	uint8_t ant_sw_len:6;
+	uint8_t ant_ids[CONFIG_BT_CTLR_DF_MAX_ANT_SW_PATTERN_LEN];
+};
+
+/* @brief Max supported CTE length in 8us units */
+#define LLL_DF_MAX_CTE_LEN 20
+/* @brief Min supported CTE length in 8us units */
+#define LLL_DF_MIN_CTE_LEN 2
+
+/* @brief Min supported length of antenna switching pattern */
+#define LLL_DF_MIN_ANT_PATTERN_LEN 3
+
+/* Provides number of available antennae for Direction Finding */
+uint8_t lll_df_ant_num_get(void);
diff --git a/subsys/bluetooth/controller/ll_sw/ull_df.c b/subsys/bluetooth/controller/ll_sw/ull_df.c
index ff56d99afd0..33c33a63cb3 100644
--- a/subsys/bluetooth/controller/ll_sw/ull_df.c
+++ b/subsys/bluetooth/controller/ll_sw/ull_df.c
@@ -25,7 +25,7 @@
 #include "ull_adv_internal.h"
 
 #include "ull_df.h"
-#include "lll_df.h"
+#include "lll_df_internal.h"
 
 #define BT_DBG_ENABLED IS_ENABLED(CONFIG_BT_DEBUG_HCI_DRIVER)
 #define LOG_MODULE_NAME bt_ctlr_ull_df