diff --git a/src/plugProjectEbisawaU/Makefile b/src/plugProjectEbisawaU/Makefile
index 18101fe61..1e66f9f1d 100644
--- a/src/plugProjectEbisawaU/Makefile
+++ b/src/plugProjectEbisawaU/Makefile
@@ -49,7 +49,7 @@ EBISAWA_FILES:=\
 
 $(EBISAWA_FILES): CFLAGS += -sym on
 
-$(BUILD_DIR)/src/plugProjectEbisawaU/ebiCardMgr.o: CFLAGS
+$(BUILD_DIR)/src/plugProjectEbisawaU/ebiCardMgr.o: CFLAGS += -sym off
 
 DEPENDS += $(EBISAWA_FILES:.o=.d)