diff --git a/src/sky9x/eeprom_driver.cpp b/src/sky9x/eeprom_driver.cpp
index afded6a31..71a9891c5 100644
--- a/src/sky9x/eeprom_driver.cpp
+++ b/src/sky9x/eeprom_driver.cpp
@@ -36,6 +36,8 @@
 
 #include "../opentx.h"
 
+extern volatile uint32_t Spi_complete; // TODO in the driver ?
+
 uint32_t spi_PDC_action( register uint8_t *command, register uint8_t *tx, register uint8_t *rx, register uint32_t comlen, register uint32_t count )
 {
 #ifndef SIMU