diff --git a/nrf5/boards/pca10040/mpconfigboard.h b/nrf5/boards/pca10040/mpconfigboard.h
index 8dd0d43d0c..0b78f700a3 100644
--- a/nrf5/boards/pca10040/mpconfigboard.h
+++ b/nrf5/boards/pca10040/mpconfigboard.h
@@ -64,5 +64,8 @@
 #define MICROPY_HW_SPI0_MISO        (24) // A24 (Arduino D12)
 #define MICROPY_HW_SPI0_NSS         (22) // A22 (Arduino D10)
 
+#define MICROPY_HW_PWM0_NAME        "PWM0"
+#define MICROPY_HW_PWM1_NAME        "PWM1"
+#define MICROPY_HW_PWM2_NAME        "PWM2"
 
 #define HELP_TEXT_BOARD_LED         "1,2,3,4"
diff --git a/nrf5/boards/pca10056/mpconfigboard.h b/nrf5/boards/pca10056/mpconfigboard.h
index 35d02ad232..feee311ddf 100644
--- a/nrf5/boards/pca10056/mpconfigboard.h
+++ b/nrf5/boards/pca10056/mpconfigboard.h
@@ -59,4 +59,11 @@
 #define MICROPY_HW_UART1_RTS        (5)
 #define MICROPY_HW_UART1_HWFC       (1)
 
+#define MICROPY_HW_PWM0_NAME        "PWM0"
+#define MICROPY_HW_PWM1_NAME        "PWM1"
+#define MICROPY_HW_PWM2_NAME        "PWM2"
+#if 0
+#define MICROPY_HW_PWM3_NAME        "PWM3"
+#endif
+
 #define HELP_TEXT_BOARD_LED         "1,2,3,4"