diff --git a/wmbattery/configure.ac b/wmbattery/configure.ac
index 4d2163e..dc15b2c 100644
--- a/wmbattery/configure.ac
+++ b/wmbattery/configure.ac
@@ -1,5 +1,5 @@
 dnl Process this file with autoconf to produce a configure script.
-AC_INIT(wmbattery.c)
+AC_INIT(wmbattery.c, 2.44)
 AC_CONFIG_HEADER(config.h)
 
 AC_CONFIG_AUX_DIR(autoconf)
diff --git a/wmbattery/wmbattery.c b/wmbattery/wmbattery.c
index 3a0482e..26fd283 100644
--- a/wmbattery/wmbattery.c
+++ b/wmbattery/wmbattery.c
@@ -314,7 +314,7 @@ char *parse_commandline(int argc, char *argv[])
 	char *s;
 
 	while (c != -1) {
-		c = getopt(argc, argv, "hd:g:if:b:w:c:l:es:a:x:");
+		c = getopt(argc, argv, "hd:g:if:b:w:c:l:es:a:x:v");
 		switch (c) {
 		case 'h':
 			printf("Usage: wmbattery [options]\n");
@@ -330,6 +330,7 @@ char *parse_commandline(int argc, char *argv[])
 			printf("\t-s granularity\tignore fluctuations less than granularity%% (implies -e)\n");
 			printf("\t-a file\t\twhen critical send file to /dev/audio\n");
 			printf("\t-x command\twhen critical execute this command\n");
+			printf("\t-v\t\tdisplay version number\n");
 			exit(0);
 			break;
 		case 'd':
@@ -374,6 +375,10 @@ char *parse_commandline(int argc, char *argv[])
 		case 'x':
 			crit_command = strdup(optarg);
 			break;
+		case 'v':
+			printf("wmbattery "PACKAGE_VERSION"\n");
+			exit(0);
+			break;
 		}
 	}