diff --git a/course/format/topics/db/upgrade.php b/course/format/topics/db/upgrade.php
index 34841e14d51..3f35b53a2cb 100644
--- a/course/format/topics/db/upgrade.php
+++ b/course/format/topics/db/upgrade.php
@@ -49,5 +49,15 @@ function xmldb_format_topics_upgrade($oldversion) {
     // Automatically generated Moodle v3.4.0 release upgrade line.
     // Put any upgrade step following this.
 
+    if ($oldversion < 2018030900) {
+
+        // During upgrade to Moodle 3.3 it could happen that general section (section 0) became 'invisible'.
+        // It should always be visible.
+        $DB->execute("UPDATE {course_sections} SET visible=1 WHERE visible=0 AND section=0 AND course IN
+        (SELECT id FROM {course} WHERE format=?)", ['topics']);
+
+        upgrade_plugin_savepoint(true, 2018030900, 'format', 'topics');
+    }
+
     return true;
 }
diff --git a/course/format/topics/version.php b/course/format/topics/version.php
index ea6ecd4ca60..aa7210fbab6 100644
--- a/course/format/topics/version.php
+++ b/course/format/topics/version.php
@@ -25,6 +25,6 @@
 
 defined('MOODLE_INTERNAL') || die();
 
-$plugin->version   = 2017111300;        // The current plugin version (Date: YYYYMMDDXX).
+$plugin->version   = 2018030900;        // The current plugin version (Date: YYYYMMDDXX).
 $plugin->requires  = 2017110800;        // Requires this Moodle version.
 $plugin->component = 'format_topics';    // Full name of the plugin (used for diagnostics).
diff --git a/course/format/weeks/db/upgrade.php b/course/format/weeks/db/upgrade.php
index 1600c73f8d6..a68f7139840 100644
--- a/course/format/weeks/db/upgrade.php
+++ b/course/format/weeks/db/upgrade.php
@@ -85,5 +85,15 @@ function xmldb_format_weeks_upgrade($oldversion) {
     // Automatically generated Moodle v3.4.0 release upgrade line.
     // Put any upgrade step following this.
 
+    if ($oldversion < 2018030900) {
+
+        // During upgrade to Moodle 3.3 it could happen that general section (section 0) became 'invisible'.
+        // It should always be visible.
+        $DB->execute("UPDATE {course_sections} SET visible=1 WHERE visible=0 AND section=0 AND course IN
+        (SELECT id FROM {course} WHERE format=?)", ['weeks']);
+
+        upgrade_plugin_savepoint(true, 2018030900, 'format', 'weeks');
+    }
+
     return true;
 }
diff --git a/course/format/weeks/version.php b/course/format/weeks/version.php
index dfe4e0c2dcc..3f1bb72506e 100644
--- a/course/format/weeks/version.php
+++ b/course/format/weeks/version.php
@@ -25,6 +25,6 @@
 
 defined('MOODLE_INTERNAL') || die();
 
-$plugin->version   = 2017111300;        // The current plugin version (Date: YYYYMMDDXX).
+$plugin->version   = 2018030900;        // The current plugin version (Date: YYYYMMDDXX).
 $plugin->requires  = 2017110800;        // Requires this Moodle version.
 $plugin->component = 'format_weeks';    // Full name of the plugin (used for diagnostics).