diff --git a/Makefile b/Makefile
index e004d8d1a0f..ce506edfcee 100644
--- a/Makefile
+++ b/Makefile
@@ -51,7 +51,7 @@ RELEASE ?= 1
 
 # Get the branch information from git
 ifneq ($(shell which git),)
-GIT_DATE := $(shell git log -n 1 --format="%ai")
+GIT_DATE := $(shell git log -n 1 --format="%ci")
 GIT_HASH := $(shell git log -n 1 --format="%h")
 GIT_BRANCH := $(shell git rev-parse --abbrev-ref HEAD | sed 's/[-_.\/]//g')
 GITINFO = .$(GIT_HASH).$(GIT_BRANCH)
@@ -60,7 +60,7 @@ GITINFO = ""
 endif
 
 ifeq ($(shell echo $(OS) | egrep -c 'Darwin|FreeBSD|OpenBSD|DragonFly'),1)
-DATE := $(shell date -j -r $(shell git log -n 1 --format="%at") +%Y%m%d%H%M)
+DATE := $(shell date -j -r $(shell git log -n 1 --format="%ct") +%Y%m%d%H%M)
 CPUS ?= $(shell sysctl hw.ncpu|awk '{print $$2}')
 else
 DATE := $(shell date --utc --date="$(GIT_DATE)" +%Y%m%d%H%M)