diff --git a/targets/TARGET_Cypress/TARGET_PSOC6/cy_serial_api.c b/targets/TARGET_Cypress/TARGET_PSOC6/cy_serial_api.c
index ee9f2536cf..6c4da8abb3 100644
--- a/targets/TARGET_Cypress/TARGET_PSOC6/cy_serial_api.c
+++ b/targets/TARGET_Cypress/TARGET_PSOC6/cy_serial_api.c
@@ -125,7 +125,6 @@ void serial_format(serial_t *obj, int data_bits, SerialParity parity, int stop_b
             break;
         default:
             MBED_ERROR(MBED_MAKE_ERROR(MBED_MODULE_DRIVER_SERIAL, MBED_ERROR_CODE_UNSUPPORTED), "Unsupported parity");
-            return;
     }
     cyhal_uart_cfg_t cfg = {
         .data_bits = data_bits,
diff --git a/targets/TARGET_Cypress/TARGET_PSOC6/cy_spi_api.c b/targets/TARGET_Cypress/TARGET_PSOC6/cy_spi_api.c
index 522d9a6ec0..f6bff0799a 100644
--- a/targets/TARGET_Cypress/TARGET_PSOC6/cy_spi_api.c
+++ b/targets/TARGET_Cypress/TARGET_PSOC6/cy_spi_api.c
@@ -45,7 +45,6 @@ SPIName spi_get_peripheral_name(PinName mosi, PinName miso, PinName mclk)
         return (SPIName)CYHAL_SCB_BASE_ADDRESSES[map->inst->block_num];
     }
     MBED_ERROR(MBED_MAKE_ERROR(MBED_MODULE_DRIVER_SPI, MBED_ERROR_CODE_FAILED_OPERATION), "SPI not found");
-    return (SPIName)0;
 }
 
 static void cy_spi_irq_handler_internal(void *handler_arg, cyhal_spi_event_t event)