diff --git a/Modules/Visualization/MonteverdiGui/src/mvdImportImagesDialog.cxx b/Modules/Visualization/MonteverdiGui/src/mvdImportImagesDialog.cxx
index 73b848ba0e894d9d3c03a1887d53a654ea2fbadf..15b403ce5bb789fae83311ce6c8791db7ff5a03e 100644
--- a/Modules/Visualization/MonteverdiGui/src/mvdImportImagesDialog.cxx
+++ b/Modules/Visualization/MonteverdiGui/src/mvdImportImagesDialog.cxx
@@ -234,14 +234,18 @@ ImportImagesDialog
 
 	if( builder->GetOverviewsCount()>0 )
 	  builder->SetBypassEnabled( true );
-	else
+	else if (count>1)
 	  {
 	  flags |= Qt::ItemIsEnabled;
 
-	  builder->SetBypassEnabled( count<=1 );
+	  builder->SetBypassEnabled( false );
 
 	  ++ m_EffectiveCount;
 	  }
+  else
+    {
+    builder->SetBypassEnabled(true);
+    }
 
 	builder->SetResolutionFactor( 2 );
 	builder->SetNbResolutions( count );