diff --git a/lib/common.php b/lib/common.php
index 425fbccb4f..fbe90e0306 100644
--- a/lib/common.php
+++ b/lib/common.php
@@ -291,7 +291,7 @@ function common_local_url($action, $args=NULL) {
 	return "http://".$config['site']['server'].'/'.$pathpart."index.php?action=${action}${extra}";
 }
 
-function commmon_date_string($dt) {
+function common_date_string($dt) {
 	// XXX: do some sexy date formatting
 	return date(DATE_RFC822);
 }