diff --git a/common.mk b/build.mk
similarity index 100%
rename from common.mk
rename to build.mk
diff --git a/cgpt/Makefile b/cgpt/Makefile
index 546656d345..8e810d421c 100644
--- a/cgpt/Makefile
+++ b/cgpt/Makefile
@@ -48,7 +48,7 @@ LIB_CGPT_CC_SRCS = \
 
 main: $(PROGNAME)
 
-include ../common.mk
+include ../build.mk
 
 LIB_CGPT_CC_OBJS = $(filter %.o, \
 	$(LIB_CGPT_CC_SRCS:%.c=${BUILD_ROOT}/%.o) \
diff --git a/firmware/Makefile b/firmware/Makefile
index 811c158baa..6dcf0bb3c0 100644
--- a/firmware/Makefile
+++ b/firmware/Makefile
@@ -115,7 +115,7 @@ else
 test : $(FWLIB)
 endif
 
-include ../common.mk
+include ../build.mk
 
 $(FWLIB) : $(LIB_OBJS)
 	rm -f $@
diff --git a/host/Makefile b/host/Makefile
index 3e3eb4cdb1..c4b24d0bb6 100644
--- a/host/Makefile
+++ b/host/Makefile
@@ -37,7 +37,7 @@ test : $(HOSTLIB)
 	$(CC) $(CFLAGS) $(INCLUDES) -o $(BUILD_ROOT)/a.out $(TESTDIR)/main.c \
 	$(HOSTLIB) -lcrypto
 
-include ../common.mk
+include ../build.mk
 
 $(HOSTLIB) : $(ALL_OBJS) $(FWLIB)
 	rm -rf $@ $(BUILD_ROOT)/.tmp