diff --git a/features/nanostack/nanostack-hal-mbed-cmsis-rtos/arm_hal_fhss_timer.cpp b/features/nanostack/nanostack-hal-mbed-cmsis-rtos/arm_hal_fhss_timer.cpp
index d592a4b947..4fe5a8a350 100644
--- a/features/nanostack/nanostack-hal-mbed-cmsis-rtos/arm_hal_fhss_timer.cpp
+++ b/features/nanostack/nanostack-hal-mbed-cmsis-rtos/arm_hal_fhss_timer.cpp
@@ -15,7 +15,7 @@
  * limitations under the License.
  */
 
-#ifdef MBED_CONF_NANOSTACK_CONFIG
+#ifdef MBED_CONF_NANOSTACK_CONFIGURATION
 
 #include "ns_types.h"
 #include "fhss_api.h"