diff --git a/htdocs/core/lib/functions.lib.php b/htdocs/core/lib/functions.lib.php
index 14982928341..2fc74e99f60 100644
--- a/htdocs/core/lib/functions.lib.php
+++ b/htdocs/core/lib/functions.lib.php
@@ -3494,13 +3494,13 @@ function setEventMessage($mesgs, $style='mesgs')
 	if (! in_array($style,array('mesgs','warnings','errors'))) dol_print_error('','Bad parameter for setEventMessage');
 	if (! is_array($mesgs))		// If mesgs is a string
 	{
-		$_SESSION['dol_events'][$style][] = $mesgs;
+		if ($mesgs) $_SESSION['dol_events'][$style][] = $mesgs;
 	}
 	else						// If mesgs is an array
 	{
 		foreach($mesgs as $mesg)
 		{
-			$_SESSION['dol_events'][$style][] = $mesg;
+			if ($mesg) $_SESSION['dol_events'][$style][] = $mesg;
 		}
 	}
 }