diff --git a/src/main/target/EUSTM32F103RC/target.h b/src/main/target/EUSTM32F103RC/target.h
index e99bd4575a..7bdc8eed31 100644
--- a/src/main/target/EUSTM32F103RC/target.h
+++ b/src/main/target/EUSTM32F103RC/target.h
@@ -99,3 +99,7 @@
 #define SERIAL_RX
 #define AUTOTUNE
 
+#define SPEKTRUM_BIND
+// USART2, PA3
+#define BIND_PORT  GPIOA
+#define BIND_PIN   Pin_3
diff --git a/src/main/target/SPARKY/target.h b/src/main/target/SPARKY/target.h
index 156986f876..a26c9eaa98 100644
--- a/src/main/target/SPARKY/target.h
+++ b/src/main/target/SPARKY/target.h
@@ -82,3 +82,7 @@
 #define GPS
 #define DISPLAY
 
+#define SPEKTRUM_BIND
+// USART2, PA3
+#define BIND_PORT GPIOA
+#define BIND_PIN Pin_3