diff --git a/targets/targets.json b/targets/targets.json
index 2f20aa1b2e..3979868bbf 100644
--- a/targets/targets.json
+++ b/targets/targets.json
@@ -2940,7 +2940,8 @@
             "TARGET_MCU_NRF51822",
             "CMSIS_VECTAB_VIRTUAL",
             "CMSIS_VECTAB_VIRTUAL_HEADER_FILE=\"cmsis_nvic.h\"",
-            "NO_SYSTICK"
+            "NO_SYSTICK",
+            "MBED_TICKLESS"
         ],
         "MERGE_BOOTLOADER": false,
         "extra_labels": ["NORDIC", "MCU_NRF51", "MCU_NRF51822_UNIFIED", "NRF5", "SDK11"],
@@ -2998,7 +2999,7 @@
     "MCU_NRF52": {
         "inherits": ["Target"],
         "core": "Cortex-M4F",
-        "macros": ["NRF52", "TARGET_NRF52832", "BLE_STACK_SUPPORT_REQD", "SOFTDEVICE_PRESENT", "S132", "CMSIS_VECTAB_VIRTUAL", "CMSIS_VECTAB_VIRTUAL_HEADER_FILE=\"cmsis_nvic.h\""],
+        "macros": ["NRF52", "TARGET_NRF52832", "BLE_STACK_SUPPORT_REQD", "SOFTDEVICE_PRESENT", "S132", "CMSIS_VECTAB_VIRTUAL", "CMSIS_VECTAB_VIRTUAL_HEADER_FILE=\"cmsis_nvic.h\"", "MBED_TICKLESS"],
         "extra_labels": ["NORDIC", "MCU_NRF52", "MCU_NRF52832", "NRF5", "SDK11", "NRF52_COMMON"],
         "OUTPUT_EXT": "hex",
         "is_disk_virtual": true,
@@ -3194,7 +3195,7 @@
         },
         "OUTPUT_EXT": "hex",
         "post_binary_hook": {"function": "NCS36510TargetCode.ncs36510_addfib"},
-        "macros": ["CM3", "CPU_NCS36510", "TARGET_NCS36510", "LOAD_ADDRESS=0x3000"],
+        "macros": ["CM3", "CPU_NCS36510", "TARGET_NCS36510", "LOAD_ADDRESS=0x3000", "MBED_TICKLESS"],
         "supported_toolchains": ["GCC_ARM", "ARM", "IAR"],
         "device_has": ["ANALOGIN", "SERIAL", "I2C", "INTERRUPTIN", "PORTIN", "PORTINOUT", "PORTOUT", "PWMOUT", "RTC", "SERIAL", "SERIAL_FC", "SLEEP", "SPI", "LOWPOWERTIMER", "TRNG", "SPISLAVE"],
         "release_versions": ["2", "5"]