1 files changed, 4 insertions, 0 deletions

diff --git a/tmk_core/avr.mk b/tmk_core/avr.mk
index 3bf2b34f8..6c03e1650 100644
--- a/tmk_core/avr.mk
+++ b/tmk_core/avr.mk
@@ -107,6 +107,10 @@ flip: $(BUILD_DIR)/$(TARGET).hex
         batchisp -hardware usb -device $(MCU) -operation start reset 0
 
 dfu: $(BUILD_DIR)/$(TARGET).hex sizeafter
+        until dfu-programmer $(MCU) get bootloader-version; do\
+                echo "Error: Bootloader not found. Trying again in 5s." ;\
+                sleep 5 ;\
+        done
 ifneq (, $(findstring 0.7, $(shell dfu-programmer --version 2>&1)))
         dfu-programmer $(MCU) erase --force
 else