diff --git a/arch/blackfin/config.mk b/arch/blackfin/config.mk
index adc9712..fcaa44f 100644
--- a/arch/blackfin/config.mk
+++ b/arch/blackfin/config.mk
@@ -43,6 +43,7 @@
 endif
 
 SYM_PREFIX = _
+export SYM_PREFIX
 
 LDR_FLAGS-y :=
 LDR_FLAGS-$(CONFIG_BFIN_BOOTROM_USES_EVT1) += -J