diff --git a/filter/algebra/filter.php b/filter/algebra/filter.php
index 75e3578e4e4..f4dd3bd7971 100644
--- a/filter/algebra/filter.php
+++ b/filter/algebra/filter.php
@@ -136,6 +136,8 @@ function algebra_filter ($courseid, $text) {
         $algebra = $matches[1][$i] . $matches[2][$i];
         $algebra = str_replace('<nolink>','',$algebra);
         $algebra = str_replace('</nolink>','',$algebra);
+        $algebra = str_replace('<span class="nolink">','',$algebra);
+        $algebra = str_replace('</span>','',$algebra);
         $align = "middle";
         if (preg_match('/^align=bottom /',$algebra)) {
           $align = "text-bottom";
diff --git a/filter/tex/filter.php b/filter/tex/filter.php
index 18df876cf9f..7e076aac97f 100644
--- a/filter/tex/filter.php
+++ b/filter/tex/filter.php
@@ -125,6 +125,8 @@ function tex_filter ($courseid, $text) {
         $texexp = $matches[1][$i] . $matches[2][$i];
         $texexp = str_replace('<nolink>','',$texexp);
         $texexp = str_replace('</nolink>','',$texexp);
+        $texexp = str_replace('<span class="nolink">','',$texexp);
+        $texexp = str_replace('</span>','',$texexp);
         $align = "middle";
         if (preg_match('/^align=bottom /',$texexp)) {
           $align = "text-bottom";