diff --git a/src/main/java/fiji/plugin/trackmate/gui/editor/LabkitLauncher.java b/src/main/java/fiji/plugin/trackmate/gui/editor/LabkitLauncher.java
index ff5212662..3e0214ab3 100644
--- a/src/main/java/fiji/plugin/trackmate/gui/editor/LabkitLauncher.java
+++ b/src/main/java/fiji/plugin/trackmate/gui/editor/LabkitLauncher.java
@@ -133,7 +133,7 @@ protected void launch( final boolean singleTimePoint )
 		// Show LabKit.
 		String title = "Editing TrackMate data for " + imp.getShortTitle();
 		if ( singleTimePoint )
-			title += "at frame " + ( currentTimePoint + 1 );
+			title += " at frame " + ( currentTimePoint + 1 );
 		final TrackMateLabkitFrame labkit = TrackMateLabkitFrame.show( model, title );
 
 		// Prepare re-importer.