diff --git a/arch/blackfin/include/asm/system.h b/arch/blackfin/include/asm/system.h
index 6bc7208..952438e 100644
--- a/arch/blackfin/include/asm/system.h
+++ b/arch/blackfin/include/asm/system.h
@@ -118,4 +118,6 @@
 	return tmp;
 }
 
+void bfin_reset_boot_spi_cs(unsigned short pin);
+
 #endif	/* _BLACKFIN_SYSTEM_H */