diff --git a/configs/saml21-xplained/include/board.h b/configs/saml21-xplained/include/board.h
index bbd336ffc8..a721c7e327 100644
--- a/configs/saml21-xplained/include/board.h
+++ b/configs/saml21-xplained/include/board.h
@@ -306,7 +306,7 @@
 #define BOARD_GCLK2_CLOCK_SOURCE      GCLK_GENCTRL_SRC_OSC32K
 #define BOARD_GCLK2_PRESCALER         32
 #undef  BOARD_GCLK2_OUTPUT_ENABLE
-#define BOARD_GCLK2_FREQUENCY         (BOARD_OSC16M_FREQUENCY / BOARD_GCLK2_PRESCALER)
+#define BOARD_GCLK2_FREQUENCY         (BOARD_OSC32K_FREQUENCY / BOARD_GCLK2_PRESCALER)
 
 /* Configure GCLK generator 3 */
 
@@ -485,11 +485,11 @@
 
 #define BOARD_SERCOM4_GCLKGEN        0
 
-#define BOARD_SERCOM4_MUXCONFIG    (USART_CTRLA_RXPAD1 | USART_CTRLA_TXPAD0_2)
-#define BOARD_SERCOM4_PINMAP_PAD0  PORT_SERCOM4_PAD0_3 /* USART TX */
-#define BOARD_SERCOM4_PINMAP_PAD1  PORT_SERCOM4_PAD1_3 /* USART RX */
-#define BOARD_SERCOM4_PINMAP_PAD2  0
-#define BOARD_SERCOM4_PINMAP_PAD3  0
+#define BOARD_SERCOM4_MUXCONFIG      (USART_CTRLA_RXPAD1 | USART_CTRLA_TXPAD0_2)
+#define BOARD_SERCOM4_PINMAP_PAD0    PORT_SERCOM4_PAD0_3 /* USART TX */
+#define BOARD_SERCOM4_PINMAP_PAD1    PORT_SERCOM4_PAD1_3 /* USART RX */
+#define BOARD_SERCOM4_PINMAP_PAD2    0
+#define BOARD_SERCOM4_PINMAP_PAD3    0
 
 #define BOARD_SERCOM4_FREQUENCY      BOARD_GCLK0_FREQUENCY