diff --git a/arduino/realtek-ambz/cores/arduino/wiring_analog.c b/arduino/realtek-ambz/cores/arduino/wiring_analog.c
index d159ba3..01b089a 100644
--- a/arduino/realtek-ambz/cores/arduino/wiring_analog.c
+++ b/arduino/realtek-ambz/cores/arduino/wiring_analog.c
@@ -77,8 +77,10 @@ uint16_t analogReadVoltage(pin_size_t pinNumber) {
 }
 
 uint16_t analogReadMaxVoltage(pin_size_t pinNumber) {
+#ifdef PIN_A1
 	if (pinNumber == PIN_A1)
 		return 5000;
+#endif
 	return 3300;
 }
 
diff --git a/boards/_base/realtek-ambz-2mb-small.json b/boards/_base/realtek-ambz-2mb-small.json
index f134d3a..e539871 100644
--- a/boards/_base/realtek-ambz-2mb-small.json
+++ b/boards/_base/realtek-ambz-2mb-small.json
@@ -1,7 +1,7 @@
 {
 	"build": {
-		"ldscript_sdk": "rlx8711B-symbol-v02-img2_xip1_2M_cpp.ld",
-		"ldscript_arduino": "rlx8711B-symbol-v02-img2_xip1_2M_cpp.ld",
+		"ldscript_sdk": "rlx8711B-symbol-v02-img2_xip1_2M_468k_cpp.ld",
+		"ldscript_arduino": "rlx8711B-symbol-v02-img2_xip1_2M_468k_cpp.ld",
 		"amb_boot_all": "boot_all_77F7.bin"
 	},
 	"flash": {