diff --git a/module/dca/tl_leaflet_vector.php b/module/dca/tl_leaflet_vector.php
index 59b766f..d301d02 100644
--- a/module/dca/tl_leaflet_vector.php
+++ b/module/dca/tl_leaflet_vector.php
@@ -339,6 +339,9 @@ $GLOBALS['TL_DCA']['tl_leaflet_vector'] = array
             'inputType' => 'textarea',
             'search'    => false,
             'eval'      => array('mandatory' => true, 'alwaysSave' => true),
+            'save_callback' => array(
+                \Netzmacht\Contao\Leaflet\Dca\Validator::callback('validateMultipleCoordinates')
+            ),
             'sql'       => "longblob NULL"
         ),
         'multiData' => array
@@ -361,6 +364,9 @@ $GLOBALS['TL_DCA']['tl_leaflet_vector'] = array
                     )
                 )
             ),
+            'save_callback' => array(
+                \Netzmacht\Contao\Leaflet\Dca\Validator::callback('validateMultipleCoordinateSets')
+            ),
             'sql'       => "longblob NULL"
         ),
         'bounds'  => array
diff --git a/src/Netzmacht/Contao/Leaflet/Dca/Validator.php b/src/Netzmacht/Contao/Leaflet/Dca/Validator.php
index b4d4bd9..6bcac9f 100644
--- a/src/Netzmacht/Contao/Leaflet/Dca/Validator.php
+++ b/src/Netzmacht/Contao/Leaflet/Dca/Validator.php
@@ -88,7 +88,24 @@ class Validator
         }
 
         foreach ($lines as $coordinate) {
-            LatLng::fromString($coordinate);
+            $this->validateCoordinates($coordinate);
+        }
+
+        return $values;
+    }
+
+    /**
+     * Validate multiple coordinate sets.
+     *
+     * @param mixed $values Given value.
+     *
+     * @return mixed
+     */
+    public function validateMultipleCoordinateSets($values)
+    {
+        $sets = deserialize($values, true);
+        foreach ($sets as $lines) {
+            $this->validateMultipleCoordinates($lines);
         }
 
         return $values;