diff --git a/flight/targets/boards/discoveryf4bare/bootloader/main.c b/flight/targets/boards/discoveryf4bare/bootloader/main.c
index aa5c7999a..c85ef675e 100644
--- a/flight/targets/boards/discoveryf4bare/bootloader/main.c
+++ b/flight/targets/boards/discoveryf4bare/bootloader/main.c
@@ -82,7 +82,7 @@ int main()
     // is 2.7 volts
     check_bor();
 
-    USB_connected = PIOS_USB_CheckAvailable(0);
+    USB_connected = PIOS_USB_CableConnected(0);
 
     if (PIOS_IAP_CheckRequest() == true) {
         PIOS_DELAY_WaitmS(1000);
diff --git a/flight/targets/boards/osd/bootloader/main.c b/flight/targets/boards/osd/bootloader/main.c
index c333ab9af..36252cc83 100644
--- a/flight/targets/boards/osd/bootloader/main.c
+++ b/flight/targets/boards/osd/bootloader/main.c
@@ -76,7 +76,7 @@ int main()
     PIOS_Board_Init();
     PIOS_IAP_Init();
 
-    USB_connected = PIOS_USB_CheckAvailable(0);
+    USB_connected = PIOS_USB_CableConnected(0);
 
     if (PIOS_IAP_CheckRequest() == true) {
         PIOS_DELAY_WaitmS(1000);
diff --git a/flight/targets/boards/revonano/bootloader/main.c b/flight/targets/boards/revonano/bootloader/main.c
index aa5c7999a..c85ef675e 100644
--- a/flight/targets/boards/revonano/bootloader/main.c
+++ b/flight/targets/boards/revonano/bootloader/main.c
@@ -82,7 +82,7 @@ int main()
     // is 2.7 volts
     check_bor();
 
-    USB_connected = PIOS_USB_CheckAvailable(0);
+    USB_connected = PIOS_USB_CableConnected(0);
 
     if (PIOS_IAP_CheckRequest() == true) {
         PIOS_DELAY_WaitmS(1000);
diff --git a/flight/targets/boards/revoproto/bootloader/main.c b/flight/targets/boards/revoproto/bootloader/main.c
index aa5c7999a..c85ef675e 100644
--- a/flight/targets/boards/revoproto/bootloader/main.c
+++ b/flight/targets/boards/revoproto/bootloader/main.c
@@ -82,7 +82,7 @@ int main()
     // is 2.7 volts
     check_bor();
 
-    USB_connected = PIOS_USB_CheckAvailable(0);
+    USB_connected = PIOS_USB_CableConnected(0);
 
     if (PIOS_IAP_CheckRequest() == true) {
         PIOS_DELAY_WaitmS(1000);
diff --git a/flight/targets/boards/sparky2/bootloader/main.c b/flight/targets/boards/sparky2/bootloader/main.c
index 02d53d948..6ed56133f 100644
--- a/flight/targets/boards/sparky2/bootloader/main.c
+++ b/flight/targets/boards/sparky2/bootloader/main.c
@@ -83,7 +83,7 @@ int main()
     // is 2.7 volts
     check_bor();
 
-    USB_connected = PIOS_USB_CheckAvailable(0);
+    USB_connected = PIOS_USB_CableConnected(0);
 
     if (PIOS_IAP_CheckRequest() == true) {
         PIOS_DELAY_WaitmS(1000);