diff --git a/features/FEATURE_BLE/targets/TARGET_Cypress/TARGET_CYW43XXX/CyH4TransportDriver.cpp b/features/FEATURE_BLE/targets/TARGET_Cypress/TARGET_CYW43XXX/CyH4TransportDriver.cpp
index 5828146764..db9277ea76 100644
--- a/features/FEATURE_BLE/targets/TARGET_Cypress/TARGET_CYW43XXX/CyH4TransportDriver.cpp
+++ b/features/FEATURE_BLE/targets/TARGET_Cypress/TARGET_CYW43XXX/CyH4TransportDriver.cpp
@@ -106,7 +106,7 @@ void CyH4TransportDriver::initialize()
        if (bt_device_wake_name != NC)
            bt_device_wake = WAKE_EVENT_ACTIVE_HIGH;
     }
-    wait_ms(500);
+    rtos::ThisThread::sleep_for(500);
 }
 
 void CyH4TransportDriver::terminate() {  }
diff --git a/features/FEATURE_BLE/targets/TARGET_Cypress/TARGET_CYW43XXX/HCIDriver.cpp b/features/FEATURE_BLE/targets/TARGET_Cypress/TARGET_CYW43XXX/HCIDriver.cpp
index 55d718aa36..5f7d82d17f 100644
--- a/features/FEATURE_BLE/targets/TARGET_Cypress/TARGET_CYW43XXX/HCIDriver.cpp
+++ b/features/FEATURE_BLE/targets/TARGET_Cypress/TARGET_CYW43XXX/HCIDriver.cpp
@@ -82,7 +82,7 @@ public:
     virtual void do_initialize()
     {
         bt_power = 1;
-        wait_ms(500);
+        rtos::ThisThread::sleep_for(500);
     }
 
     virtual void do_terminate() { }
@@ -295,7 +295,7 @@ private:
         service_pack_next = &HCIDriver::terminate_service_pack_transfert;;
         service_pack_index = 0;
         service_pack_transfered = false;
-        wait_ms(1000);
+        rtos::ThisThread::sleep_for(1000);
         send_service_pack_command();
     }