diff --git a/plat/intel/soc/common/include/socfpga_mailbox.h b/plat/intel/soc/common/include/socfpga_mailbox.h
index c5f2fbe..c4b9e59 100644
--- a/plat/intel/soc/common/include/socfpga_mailbox.h
+++ b/plat/intel/soc/common/include/socfpga_mailbox.h
@@ -120,5 +120,6 @@
 void mailbox_clear_response(void);
 
 uint32_t intel_mailbox_get_config_status(uint32_t cmd);
+int intel_mailbox_is_fpga_not_ready(void);
 
 #endif /* SOCFPGA_MBOX_H */