diff --git a/lib/moodlelib.php b/lib/moodlelib.php
index 0f9cc5f7cfa10..63ae7a0105789 100644
--- a/lib/moodlelib.php
+++ b/lib/moodlelib.php
@@ -1029,10 +1029,16 @@ function clean_param($param, $type) {
             // Allow http absolute, root relative and relative URLs within wwwroot.
             $param = clean_param($param, PARAM_URL);
             if (!empty($param)) {
+
+                // Simulate the HTTPS version of the site.
+                $httpswwwroot = str_replace('http://', 'https://', $CFG->wwwroot);
+
                 if (preg_match(':^/:', $param)) {
                     // Root-relative, ok!
-                } else if (preg_match('/^'.preg_quote($CFG->wwwroot, '/').'/i', $param)) {
+                } else if (preg_match('/^' . preg_quote($CFG->wwwroot, '/') . '/i', $param)) {
                     // Absolute, and matches our wwwroot.
+                } else if (!empty($CFG->loginhttps) && preg_match('/^' . preg_quote($httpswwwroot, '/') . '/i', $param)) {
+                    // Absolute, and matches our httpswwwroot.
                 } else {
                     // Relative - let's make sure there are no tricks.
                     if (validateUrlSyntax('/' . $param, 's-u-P-a-p-f+q?r?')) {
diff --git a/lib/tests/moodlelib_test.php b/lib/tests/moodlelib_test.php
index 8b4a52d8b816c..85b449616eecd 100644
--- a/lib/tests/moodlelib_test.php
+++ b/lib/tests/moodlelib_test.php
@@ -583,12 +583,32 @@ public function test_clean_param_url() {
 
     public function test_clean_param_localurl() {
         global $CFG;
+        // External, invalid.
+        $this->assertSame('', clean_param('funny:thing', PARAM_LOCALURL));
         $this->assertSame('', clean_param('http://google.com/', PARAM_LOCALURL));
+        $this->assertSame('', clean_param('https://google.com/?test=true', PARAM_LOCALURL));
         $this->assertSame('', clean_param('http://some.very.long.and.silly.domain/with/a/path/', PARAM_LOCALURL));
+
+        // Local absolute.
         $this->assertSame(clean_param($CFG->wwwroot, PARAM_LOCALURL), $CFG->wwwroot);
+        $this->assertSame($CFG->wwwroot . '/with/something?else=true',
+            clean_param($CFG->wwwroot . '/with/something?else=true', PARAM_LOCALURL));
+
+        // Local relative.
         $this->assertSame('/just/a/path', clean_param('/just/a/path', PARAM_LOCALURL));
-        $this->assertSame('', clean_param('funny:thing', PARAM_LOCALURL));
         $this->assertSame('course/view.php?id=3', clean_param('course/view.php?id=3', PARAM_LOCALURL));
+
+        // Local absolute HTTPS.
+        $httpsroot = str_replace('http:', 'https:', $CFG->wwwroot);
+        $initialloginhttps = $CFG->loginhttps;
+        $CFG->loginhttps = false;
+        $this->assertSame('', clean_param($httpsroot, PARAM_LOCALURL));
+        $this->assertSame('', clean_param($httpsroot . '/with/something?else=true', PARAM_LOCALURL));
+        $CFG->loginhttps = true;
+        $this->assertSame($httpsroot, clean_param($httpsroot, PARAM_LOCALURL));
+        $this->assertSame($httpsroot . '/with/something?else=true',
+            clean_param($httpsroot . '/with/something?else=true', PARAM_LOCALURL));
+        $CFG->loginhttps = $initialloginhttps;
     }
 
     public function test_clean_param_file() {