diff --git a/COMPILE.TXT b/COMPILE.TXT
index fa2b1d7c..53d6885f 100644
--- a/COMPILE.TXT
+++ b/COMPILE.TXT
@@ -43,11 +43,12 @@ Unicorn requires few dependent packages as followings
 
   The other way of customize Unicorn without having to edit config.mk is to
   pass the desired options on the commandline to ./make.sh. Currently,
-  Unicorn supports 3 options, as followings.
+  Unicorn supports 4 options, as followings.
 
   - UNICORN_ARCHS: specify list of architectures to compiled in.
   - UNICORN_STATIC: build static library.
   - UNICORN_SHARED: build dynamic (shared) library.
+  - UNICORN_QEMU_FLAGS: specify extra flags for qemu's configure script
 
   To avoid editing config.mk for these customization, we can pass their values to
   make.sh, as followings.
diff --git a/Makefile b/Makefile
index d62eec00..148baa73 100644
--- a/Makefile
+++ b/Makefile
@@ -204,11 +204,11 @@ config:
 qemu/config-host.h-timestamp:
 ifeq ($(UNICORN_DEBUG),yes)
 	cd qemu && \
-	./configure --extra-cflags="$(UNICORN_CFLAGS)" --target-list="$(UNICORN_TARGETS)"
+	./configure --extra-cflags="$(UNICORN_CFLAGS)" --target-list="$(UNICORN_TARGETS)" ${UNICORN_QEMU_FLAGS}
 	printf "$(UNICORN_ARCHS)" > config.log
 else
 	cd qemu && \
-	./configure --disable-debug-info --extra-cflags="$(UNICORN_CFLAGS)" --target-list="$(UNICORN_TARGETS)"
+	./configure --disable-debug-info --extra-cflags="$(UNICORN_CFLAGS)" --target-list="$(UNICORN_TARGETS)" ${UNICORN_QEMU_FLAGS}
 	printf "$(UNICORN_ARCHS)" > config.log
 endif