diff --git a/src/main/drivers/vtx_common.c b/src/main/drivers/vtx_common.c
index fff7fcab6b..b58121487d 100644
--- a/src/main/drivers/vtx_common.c
+++ b/src/main/drivers/vtx_common.c
@@ -42,6 +42,11 @@ void vtxCommonRegisterDevice(vtxDevice_t *pDevice)
     vtxDevice = pDevice;
 }
 
+bool vtxCommonDeviceRegistered(void)
+{
+    return vtxDevice;
+}
+
 void vtxCommonProcess(uint32_t currentTimeUs)
 {
     if (!vtxDevice)
diff --git a/src/main/drivers/vtx_common.h b/src/main/drivers/vtx_common.h
index 000859ccab..fc74f130d8 100644
--- a/src/main/drivers/vtx_common.h
+++ b/src/main/drivers/vtx_common.h
@@ -78,6 +78,7 @@ typedef struct vtxVTable_s {
 
 void vtxCommonInit(void);
 void vtxCommonRegisterDevice(vtxDevice_t *pDevice);
+bool vtxCommonDeviceRegistered(void);
 
 // VTable functions
 void vtxCommonProcess(uint32_t currentTimeUs);
diff --git a/src/main/fc/fc_init.c b/src/main/fc/fc_init.c
index 27c4c56c57..9edd9cc452 100644
--- a/src/main/fc/fc_init.c
+++ b/src/main/fc/fc_init.c
@@ -677,7 +677,7 @@ void init(void)
 #endif
 
 #ifdef VTX_RTC6705
-#ifdef VTX_RTC6705OPTIONAL
+#ifdef VTX_RTC6705_OPTIONAL
     if (!vtxCommonDeviceRegistered()) // external VTX takes precedence when configured.
 #endif
     {