diff --git a/gitstats b/gitstats
index c71b0e4..a44dcf3 100755
--- a/gitstats
+++ b/gitstats
@@ -327,7 +327,7 @@ class GitDataCollector(DataCollector):
 
 		# Collect revision statistics
 		# Outputs "<stamp> <date> <time> <timezone> <author> '<' <mail> '>'"
-		lines = getpipeoutput(['git rev-list --pretty=format:"%%at %%ai %%aN <%%aE>" %s' % getlogrange('HEAD'), 'grep -v ^commit']).split('\n')
+		lines = getpipeoutput(['git rev-list --pretty=format:"%%at %%ai %%aN <%%aE>" %s' % getlogrange('HEAD'), 'grep -av ^commit | grep -ax \'.*\'']).split('\n')
 		for line in lines:
 			parts = line.split(' ', 4)
 			author = ''