diff --git a/htdocs/comm/action/index.php b/htdocs/comm/action/index.php
index 7eeda32dfed..8f23d472dbb 100644
--- a/htdocs/comm/action/index.php
+++ b/htdocs/comm/action/index.php
@@ -528,7 +528,12 @@ $newcardbutton = '';
 if ($user->rights->agenda->myactions->create || $user->rights->agenda->allactions->create) {
 	$tmpforcreatebutton = dol_getdate(dol_now(), true);
 
-	$newparam = 'month='.str_pad($month, 2, "0", STR_PAD_LEFT).'&year='.$tmpforcreatebutton['year'];
+	if(isset($newparam)) {
+		$newparam .= '&month='.str_pad($month, 2, "0", STR_PAD_LEFT).'&year='.$tmpforcreatebutton['year'];
+	} 
+	else {
+		$newparam = 'month='.str_pad($month, 2, "0", STR_PAD_LEFT).'&year='.$tmpforcreatebutton['year'];
+	}
 
 	//$param='month='.$monthshown.'&year='.$year;
 	$hourminsec = '100000';