diff --git a/source/blender/blenkernel/intern/anim_visualization.cc b/source/blender/blenkernel/intern/anim_visualization.cc
index 940d63f6c06..a0807285901 100644
--- a/source/blender/blenkernel/intern/anim_visualization.cc
+++ b/source/blender/blenkernel/intern/anim_visualization.cc
@@ -141,8 +141,9 @@ bMotionPath *animviz_verify_motionpaths(ReportList *reports,
     return nullptr;
   }
 
-  const int expected_length = avs->path_ef - avs->path_sf;
-  BLI_assert(expected_length > 0); /* Because the `if` above. */
+  /* Adding 1 because the avs range is inclusive on both ends. */
+  const int expected_length = (avs->path_ef - avs->path_sf) + 1;
+  BLI_assert(expected_length > 1); /* Because the `if` above. */
 
   /* If there is already a motionpath, just return that, provided its settings
    * are ok (saves extra free+alloc). */
@@ -159,7 +160,7 @@ bMotionPath *animviz_verify_motionpaths(ReportList *reports,
     /* Only reuse a path if it was already a valid path, and of the expected length. */
     if (mpath->start_frame != mpath->end_frame && mpath->length == expected_length) {
       mpath->start_frame = avs->path_sf;
-      mpath->end_frame = avs->path_ef;
+      mpath->end_frame = avs->path_ef + 1;
       return mpath;
     }
 
@@ -173,7 +174,7 @@ bMotionPath *animviz_verify_motionpaths(ReportList *reports,
 
   /* Copy mpath settings from the viz settings. */
   mpath->start_frame = avs->path_sf;
-  mpath->end_frame = avs->path_ef;
+  mpath->end_frame = avs->path_ef + 1;
   mpath->length = expected_length;
 
   if (avs->path_bakeflag & MOTIONPATH_BAKE_HEADS) {
diff --git a/source/blender/draw/engines/overlay/overlay_motion_path.cc b/source/blender/draw/engines/overlay/overlay_motion_path.cc
index 0968d76bac5..770674b3a71 100644
--- a/source/blender/draw/engines/overlay/overlay_motion_path.cc
+++ b/source/blender/draw/engines/overlay/overlay_motion_path.cc
@@ -93,7 +93,7 @@ static void motion_path_get_frame_range_to_draw(bAnimVizSettings *avs,
   }
   else {
     start = avs->path_sf;
-    end = avs->path_ef;
+    end = avs->path_ef + 1;
   }
 
   if (start > end) {
diff --git a/source/blender/makesdna/DNA_action_types.h b/source/blender/makesdna/DNA_action_types.h
index 21bebd01555..b15758caecb 100644
--- a/source/blender/makesdna/DNA_action_types.h
+++ b/source/blender/makesdna/DNA_action_types.h
@@ -57,9 +57,9 @@ typedef struct bMotionPath {
   /** The number of cached verts. */
   int length;
 
-  /** For drawing paths, the start frame number. */
+  /** For drawing paths, the start frame number. Inclusive.*/
   int start_frame;
-  /** For drawing paths, the end frame number. */
+  /** For drawing paths, the end frame number. Exclusive. */
   int end_frame;
 
   /** Optional custom color. */
@@ -113,7 +113,7 @@ typedef struct bAnimVizSettings {
   short path_bakeflag;
   char _pad[4];
 
-  /** Start and end frames of path-calculation range. */
+  /** Start and end frames of path-calculation range. Both are inclusive.*/
   int path_sf, path_ef;
   /** Number of frames before/after current frame to show. */
   int path_bc, path_ac;