diff --git a/CHANGELOG.md b/CHANGELOG.md
index 446a652..8bdd88a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -11,6 +11,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Fixed
 
  - Fix ordering changes in layer control element aren't recognized ([#72](https://github.com/netzmacht/contao-leaflet-maps/issues/72))
+ - Fix markers with negative coordinates aren't displayed ([#74](https://github.com/netzmacht/contao-leaflet-maps/issues/74))
 
 ## [3.1.3] - 2019-01-10
 
diff --git a/src/Model/MarkerModel.php b/src/Model/MarkerModel.php
index 8064a1d..6a4240b 100644
--- a/src/Model/MarkerModel.php
+++ b/src/Model/MarkerModel.php
@@ -50,8 +50,8 @@ class MarkerModel extends AbstractActiveModel
                 [
                     $table . '.active=1',
                     $table . '.pid=?',
-                    $table . '.latitude>0',
-                    $table . '.longitude>0',
+                    $table . '.latitude IS NOT NULL',
+                    $table . '.longitude IS NOT NULL',
                 ],
                 [$pid],
                 ['order' => 'sorting']