diff --git a/include/drivers/allwinner/axp.h b/include/drivers/allwinner/axp.h
index 222820b..8b90c7f 100644
--- a/include/drivers/allwinner/axp.h
+++ b/include/drivers/allwinner/axp.h
@@ -47,6 +47,13 @@
 
 int axp_check_id(void);
 void axp_power_off(void);
+
+#if SUNXI_SETUP_REGULATORS == 1
 void axp_setup_regulators(const void *fdt);
+#else
+static inline void axp_setup_regulators(const void *fdt)
+{
+}
+#endif
 
 #endif /* AXP_H */