diff --git a/source/blender/makesdna/DNA_tracking_types.h b/source/blender/makesdna/DNA_tracking_types.h
index 5db523dfad1..1a5b2360732 100644
--- a/source/blender/makesdna/DNA_tracking_types.h
+++ b/source/blender/makesdna/DNA_tracking_types.h
@@ -259,9 +259,9 @@ typedef struct MovieTrackingSettings {
   short default_algorithm_flag;
   /** Minimal correlation which is still treated as successful tracking. */
   float default_minimum_correlation;
-  /** Size of pattern area for new tracks. */
+  /** Size of pattern area for new tracks, measured in pixels. */
   short default_pattern_size;
-  /** Size of search area for new tracks. */
+  /** Size of search area for new tracks, measured in pixels. */
   short default_search_size;
   /** Number of frames to be tracked during single tracking session
    * (if TRACKING_FRAMES_LIMIT is set). */