diff --git a/lang/en/game.php b/lang/en/game.php
index 2f252e4..28d8d18 100644
--- a/lang/en/game.php
+++ b/lang/en/game.php
@@ -300,6 +300,7 @@ $string[ 'sudoku_maxquestions'] = 'Maximum number of questions';
 $string[ 'sudoku_options'] = 'Sudoku options';
 $string[ 'toptext'] = 'Text at the top of page';
 $string[ 'userdefined'] = 'User defined';
+$string[ 'different_glossary_category'] = "The selected category doesn't corespond to selected glossary";
 
 // File preview.php.
 $string[ 'only_teachers'] = 'Only teacher can see this page';
diff --git a/mod_form.php b/mod_form.php
index 3542108..ba0c187 100644
--- a/mod_form.php
+++ b/mod_form.php
@@ -442,6 +442,8 @@ class mod_game_mod_form extends moodleform_mod {
      * @return moodle_url
      */
     public function validation($data, $files) {
+        global $CFG, $DB;
+
         $errors = parent::validation($data, $files);
 
         // Check open and close times are consistent.
@@ -450,6 +452,19 @@ class mod_game_mod_form extends moodleform_mod {
             $errors['timeclose'] = get_string('closebeforeopen', 'quiz');
         }
 
+        if( $data['glossarycategoryid'] != 0) {
+            $sql = "SELECT glossaryid FROM {$CFG->prefix}glossary_categories ".
+            " WHERE id=".$data[ 'glossarycategoryid'];
+            $rec = $DB->get_record_sql( $sql);
+            if( $rec != false) {
+                if( $data[ 'glossaryid'] != $rec->glossaryid) {
+                    $s = get_string( 'different_glossary_category', 'game');
+                    $errors['glossaryid'] = $s;
+                    $errors['glossarycategoryid'] = $s;
+                }
+            }
+        }
+
         return $errors;
     }
 
diff --git a/version.php b/version.php
index 507d0bd..658dcdc 100644
--- a/version.php
+++ b/version.php
@@ -35,7 +35,7 @@ if (!isset( $plugin)) {
 }
 
 $plugin->component = 'mod_game';  // Full name of the plugin (used for diagnostics).
-$plugin->version   = 2017062901;  // The current module version (Date: YYYYMMDDXX).
+$plugin->version   = 2017062902;  // The current module version (Date: YYYYMMDDXX).
 $plugin->requires  = 2010112400;  // Requires Moodle 2.0.
 $plugin->cron      = 0;           // Period for cron to check this module (secs).
 $plugin->release   = '2017-06-29';