diff --git a/htdocs/core/lib/functions.lib.php b/htdocs/core/lib/functions.lib.php
index e6f38d50da2..e7fd28eb927 100644
--- a/htdocs/core/lib/functions.lib.php
+++ b/htdocs/core/lib/functions.lib.php
@@ -7483,7 +7483,7 @@ function dol_textishtml($msg, $option = 0)
 			return true;
 		} elseif (preg_match('/<\/textarea/i', $msg)) {
 			return true;
-		} elseif (preg_match('/<(b|em|i|u)(\s*[^>]+)?>/i', $msg)) {
+		} elseif (preg_match('/<(b|em|i|u)(\s+[^>]+)?>/i', $msg)) {
 			return true;
 		} elseif (preg_match('/<br/i', $msg)) {
 			return true;
@@ -7498,7 +7498,7 @@ function dol_textishtml($msg, $option = 0)
 			return true;
 		} elseif (preg_match('/<\/textarea/i', $msg)) {
 			return true;
-		} elseif (preg_match('/<(b|em|i|u)(\s*[^>]+)?>/i', $msg)) {
+		} elseif (preg_match('/<(b|em|i|u)(\s+[^>]+)?>/i', $msg)) {
 			return true;
 		} elseif (preg_match('/<br\/>/i', $msg)) {
 			return true;