--- a/tf-tool/tf-tool.c
+++ b/tf-tool/tf-tool.c
@@ -26,6 +26,9 @@
 #include <errno.h>
 #include <libgen.h>
 #include <pwd.h>
+#include <grp.h>
+#include <sys/stat.h>
+#include <unistd.h>
 
 #include <config.h>
 #include <libthinkfinger.h>
@@ -54,6 +57,21 @@
 	int swipe_failed;
 } s_tfdata;
 
+int changegroup(const char *groupname,const char *filename)
+{
+	struct group *g;
+	g = getgrnam(groupname);
+	if(g == NULL) {
+		perror("getgrnam:");
+		return 1;
+	}
+	if( chown(filename,-1,g->gr_gid) == -1) {
+		perror("chown: ");
+		return 1;	
+	}
+	return 0;
+}
+
 static void print_status (int swipe_success, int swiped_required, int swipe_failed)
 {
 	printf ("\rPlease swipe your finger (successful swipes %i/%i, failed swipes: %i)...",
@@ -64,6 +82,8 @@
 static void callback (libthinkfinger_state state, void *data)
 {
 	char *str;
+	int err;
+	gid_t gfp;
 	s_tfdata *tfdata = (s_tfdata *) data;
 
 	if (tfdata->verbose == true) {
@@ -108,8 +128,18 @@
 			case TF_STATE_ENROLL_SUCCESS:
 				print_status (tfdata->swipe_success, 3, tfdata->swipe_failed);
 				printf (" done.\nStoring data (%s)...", tfdata->bir);
-				fflush (stdout);
-				break;
+				/*small hack to change group and chmod 640 on created bir file*/
+				err = chmod(tfdata->bir, S_IRUSR | S_IWUSR | S_IRGRP);
+				if(err == -1) { 
+					printf("Couldn't change perms on file %s\n",tfdata->bir);
+					perror("chmod:");
+					fflush(stdout);
+					break;
+				}
+				changegroup("fingerprint",tfdata->bir);
+				fflush(stdout);
+				break;	
+				/*done*/
 			case TF_STATE_SWIPE_FAILED:
 				print_status (tfdata->swipe_success, 3, ++tfdata->swipe_failed);
 				break;