diff --git a/dummy/common/sam.h b/dummy/common/sam.h
index ced1bc9..8c9ad48 100644
--- a/dummy/common/sam.h
+++ b/dummy/common/sam.h
@@ -1,3 +1,10 @@
 #pragma once
 
 typedef int generic_clock_generator_t;
+
+#define HAL_GPIO_PMUX_EIC (0)
+#define HAL_GPIO_PMUX_ADC (1)
+#define HAL_GPIO_PMUX_AC (1)
+#define HAL_GPIO_PMUX_PTC (1)
+#define HAL_GPIO_PMUX_SERCOM (2)
+#define HAL_GPIO_PMUX_SERCOM_ALT (3)