diff --git a/subsys/bluetooth/controller/CMakeLists.txt b/subsys/bluetooth/controller/CMakeLists.txt
index 2b75037a833a7d..4fef0c30ee6c02 100644
--- a/subsys/bluetooth/controller/CMakeLists.txt
+++ b/subsys/bluetooth/controller/CMakeLists.txt
@@ -162,7 +162,7 @@ if(CONFIG_SOC_COMPATIBLE_NRF)
 endif()
 
 zephyr_library_compile_options_ifdef(
-  CONFIG_BT_CTLR_FAST_ENC
+  CONFIG_BT_CTLR_OPTIMIZE_FOR_SPEED
   ${OPTIMIZE_FOR_SPEED_FLAG}
   )
 
diff --git a/subsys/bluetooth/controller/Kconfig b/subsys/bluetooth/controller/Kconfig
index 98be4f502fed40..7046a55d208901 100644
--- a/subsys/bluetooth/controller/Kconfig
+++ b/subsys/bluetooth/controller/Kconfig
@@ -401,6 +401,12 @@ endif # BT_PHY_UPDATE
 
 if BT_LL_SW
 
+config BT_CTLR_OPTIMIZE_FOR_SPEED
+	bool "Optimize for Speed"
+	default y if BT_CTLR_LE_ENC
+	help
+	  Optimize compilation of controller for execution speed.
+
 config BT_CTLR_WORKER_PRIO
 	int "Radio and Ticker's Worker IRQ priority"
 	range 0 3 if SOC_SERIES_NRF51X