diff --git a/tools/blktap2/drivers/Makefile b/tools/blktap2/drivers/Makefile
index edf8ef8c04..959fa76bf2 100644
--- a/tools/blktap2/drivers/Makefile
+++ b/tools/blktap2/drivers/Makefile
@@ -57,7 +57,7 @@ LIBAIO_DIR = $(XEN_ROOT)/tools/libaio/src
 MEMSHR_DIR = $(XEN_ROOT)/tools/memshr
 
 MEMSHRLIBS :=
-ifeq ($(CONFIG_Linux), y)
+ifeq ($(CONFIG_Linux), __fixme__)
 CFLAGS += -DMEMSHR
 MEMSHRLIBS += $(MEMSHR_DIR)/libmemshr.a
 endif