diff --git a/cpu/samd21/periph/gpio.c b/cpu/samd21/periph/gpio.c
index fb24b7b7fb..cf31d73060 100644
--- a/cpu/samd21/periph/gpio.c
+++ b/cpu/samd21/periph/gpio.c
@@ -46,7 +46,7 @@ static const int8_t exti_config[2][32] = {
     {-1,  1, -1, -1,  4,  5,  6,  7, -1,  9, 10, 11, 12, 13, 14, 15,
      -1,  1,  2,  3, -1, -1,  6,  7, 12, 13, -1, 15,  8, -1, 10, 11},
     { 0, -1,  2,  3, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-      0,  1, -1, -1, -1, -1,  6,  7, -1, -1, -1,  0,  8, -1, -1, -1},
+      0,  1, -1, -1, -1, -1,  6,  7, -1, -1, -1, -1,  8, -1, -1, -1},
 };
 
 /**