Index: Ringtoets/ClosingStructures/src/Ringtoets.ClosingStructures.Plugin/ClosingStructuresPlugin.cs
===================================================================
diff -u -r2a81f01756e227d5ce93717b21b87e8a5cd5fcbb -r41e736b69f6b44e69788cf1ebad1b05513a5efe8
--- Ringtoets/ClosingStructures/src/Ringtoets.ClosingStructures.Plugin/ClosingStructuresPlugin.cs	(.../ClosingStructuresPlugin.cs)	(revision 2a81f01756e227d5ce93717b21b87e8a5cd5fcbb)
+++ Ringtoets/ClosingStructures/src/Ringtoets.ClosingStructures.Plugin/ClosingStructuresPlugin.cs	(.../ClosingStructuresPlugin.cs)	(revision 41e736b69f6b44e69788cf1ebad1b05513a5efe8)
@@ -212,7 +212,7 @@
                 Category = RingtoetsCommonFormsResources.Ringtoets_Category,
                 Image = RingtoetsCommonFormsResources.StructuresIcon,
                 FileFilterGenerator = CreateClosingStructureFileFilter(),
-                IsEnabled = context => context.AssessmentSection.ReferenceLine != null,
+                IsEnabled = context => context.AssessmentSection.ReferenceLine.Points.Any(),
                 VerifyUpdates = context => VerifyStructuresShouldUpdate(
                     context.FailureMechanism,
                     RingtoetsCommonIOResources.VerifyStructuresShouldUpdate_When_importing_Calculation_with_Structure_data_output_will_be_cleared_confirm)
Index: Ringtoets/ClosingStructures/test/Ringtoets.ClosingStructures.Plugin.Test/ImportInfos/ClosingStructuresContextImportInfoTest.cs
===================================================================
diff -u -r16ecec5a2d6f9f48bed7dbe05c5232024b34c286 -r41e736b69f6b44e69788cf1ebad1b05513a5efe8
--- Ringtoets/ClosingStructures/test/Ringtoets.ClosingStructures.Plugin.Test/ImportInfos/ClosingStructuresContextImportInfoTest.cs	(.../ClosingStructuresContextImportInfoTest.cs)	(revision 16ecec5a2d6f9f48bed7dbe05c5232024b34c286)
+++ Ringtoets/ClosingStructures/test/Ringtoets.ClosingStructures.Plugin.Test/ImportInfos/ClosingStructuresContextImportInfoTest.cs	(.../ClosingStructuresContextImportInfoTest.cs)	(revision 41e736b69f6b44e69788cf1ebad1b05513a5efe8)
@@ -110,12 +110,12 @@
         }
 
         [Test]
-        public void IsEnabled_ReferenceLineSet_ReturnTrue()
+        public void IsEnabled_ReferenceLineWithGeometry_ReturnTrue()
         {
             // Setup
             var mocks = new MockRepository();
             var assessmentSection = mocks.Stub<IAssessmentSection>();
-            assessmentSection.Stub(a => a.ReferenceLine).Return(new ReferenceLine());
+            assessmentSection.Stub(a => a.ReferenceLine).Return(ReferenceLineTestFactory.CreateReferenceLineWithGeometry());
             mocks.ReplayAll();
 
             var failureMechanism = new ClosingStructuresFailureMechanism();
@@ -136,11 +136,12 @@
         }
 
         [Test]
-        public void IsEnabled_ReferenceLineNotSet_ReturnFalse()
+        public void IsEnabled_ReferenceLineWithoutGeometry_ReturnFalse()
         {
             // Setup
             var mocks = new MockRepository();
             var assessmentSection = mocks.Stub<IAssessmentSection>();
+            assessmentSection.Stub(a => a.ReferenceLine).Return(new ReferenceLine());
             mocks.ReplayAll();
 
             var failureMechanism = new ClosingStructuresFailureMechanism();