diff --git a/subsys/bluetooth/controller/hal/radio.c b/subsys/bluetooth/controller/hal/radio.c
index 9b56643ffb9..bffffa8f520 100644
--- a/subsys/bluetooth/controller/hal/radio.c
+++ b/subsys/bluetooth/controller/hal/radio.c
@@ -25,7 +25,7 @@
 
 #if defined(CONFIG_SOC_SERIES_NRF51X)
 #define RADIO_PDU_LEN_MAX (BIT(5) - 1)
-#elif defined(NRF52)
+#elif defined(CONFIG_SOC_SERIES_NRF52X)
 #define RADIO_PDU_LEN_MAX (BIT(8) - 1)
 #else
 #error "Platform not defined."