diff --git a/libraries/AP_BoardConfig/AP_BoardConfig.h b/libraries/AP_BoardConfig/AP_BoardConfig.h
index 934f55c326..8878939b94 100644
--- a/libraries/AP_BoardConfig/AP_BoardConfig.h
+++ b/libraries/AP_BoardConfig/AP_BoardConfig.h
@@ -194,7 +194,7 @@ private:
     void board_setup_drivers(void);
     bool spi_check_register(const char *devname, uint8_t regnum, uint8_t value, uint8_t read_flag = 0x80);
     void validate_board_type(void);
-    bool check_cubeblack(void);
+    void check_cubeblack(void);
     void board_autodetect(void);
 
 #endif // AP_FEATURE_BOARD_DETECT