diff --git a/cpu/mips_pic32_common/include/periph_cpu_common.h b/cpu/mips_pic32_common/include/periph_cpu_common.h
index b87a17ec87..26008733f0 100644
--- a/cpu/mips_pic32_common/include/periph_cpu_common.h
+++ b/cpu/mips_pic32_common/include/periph_cpu_common.h
@@ -78,6 +78,29 @@ enum {
  */
 #define PERIPH_TIMER_PROVIDES_SET
 
+
+/**
+ * @brief   Available MUX values for configuring a pin's alternate function
+ */
+typedef enum {
+    GPIO_AF0 = 0,           /**< use alternate function 0 */
+    GPIO_AF1,               /**< use alternate function 1 */
+    GPIO_AF2,               /**< use alternate function 2 */
+    GPIO_AF3,               /**< use alternate function 3 */
+    GPIO_AF4,               /**< use alternate function 4 */
+    GPIO_AF5,               /**< use alternate function 5 */
+    GPIO_AF6,               /**< use alternate function 6 */
+    GPIO_AF7,               /**< use alternate function 7 */
+    GPIO_AF8,               /**< use alternate function 8 */
+    GPIO_AF9,               /**< use alternate function 9 */
+    GPIO_AF10,              /**< use alternate function 10 */
+    GPIO_AF11,              /**< use alternate function 11 */
+    GPIO_AF12,              /**< use alternate function 12 */
+    GPIO_AF13,              /**< use alternate function 13 */
+    GPIO_AF14,              /**< use alternate function 14 */
+    GPIO_AF15               /**< use alternate function 15 */
+} gpio_af_t;
+
 #ifdef __cplusplus
 }
 #endif