diff --git a/platformio.ini b/platformio.ini
index b6b6674..ab7e463 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -34,6 +34,7 @@ build_flags =
 	-D USER_SSID=\""\""           # =\""myssid\""
 	-D USER_SSID_PWD=\""\""       # =\""mypwd\""	
 	-D CFG_APPVER="\"0.9.0\""
+	!python script/git_rev.py
 lib_deps = # Switched to forks for better version control.
 	# Using local copy of these libraries
   #https://github.com/jrowberg/i2cdevlib.git#<document> 		
diff --git a/script/git_rev.py b/script/git_rev.py
new file mode 100644
index 0000000..bdfb557
--- /dev/null
+++ b/script/git_rev.py
@@ -0,0 +1,8 @@
+import subprocess
+
+revision = (
+    subprocess.check_output(["git", "rev-parse", "HEAD"])
+    .strip()
+    .decode("utf-8")
+)
+print("-D CFG_GITREV='\"%s\"'" % revision)
diff --git a/src/helper.cpp b/src/helper.cpp
index 5f00eb6..68d0b36 100644
--- a/src/helper.cpp
+++ b/src/helper.cpp
@@ -191,7 +191,7 @@ void deepSleep(int t) {
 // Print the build options used
 //
 void printBuildOptions() {
-  Log.notice(F("Build options: %s LOGLEVEL %d "
+  Log.notice(F("Build options: %s (%s) LOGLEVEL %d "
 #ifdef SKIP_SLEEPMODE
                "SKIP_SLEEP "
 #endif
@@ -205,7 +205,7 @@ void printBuildOptions() {
                "OTA "
 #endif
                CR),
-             CFG_APPVER, LOG_LEVEL);
+             CFG_APPVER, CFG_GITREV, LOG_LEVEL);
 }
 
 //