diff --git a/source/blender/blenlib/intern/task.c b/source/blender/blenlib/intern/task.c
index d3b11d8e6d0..2be688a3d8c 100644
--- a/source/blender/blenlib/intern/task.c
+++ b/source/blender/blenlib/intern/task.c
@@ -662,7 +662,11 @@ void BLI_task_parallel_range_ex(
 	ParallelRangeState state;
 	int i, num_threads, num_tasks;
 
-	BLI_assert(start < stop);
+	if (start == stop) {
+		return;
+	}
+
+	BLI_assert(start <= stop);
 
 	/* If it's not enough data to be crunched, don't bother with tasks at all,
 	 * do everything from the main thread.