diff --git a/source/blender/editors/space_sequencer/sequencer_add.c b/source/blender/editors/space_sequencer/sequencer_add.c
index d09a686a487..b9e6daf5c3a 100644
--- a/source/blender/editors/space_sequencer/sequencer_add.c
+++ b/source/blender/editors/space_sequencer/sequencer_add.c
@@ -638,6 +638,20 @@ static int sequencer_add_movie_strip_invoke(bContext *C, wmOperator *op, const w
 {
 	PropertyRNA *prop;
 	Scene *scene = CTX_data_scene(C);
+	Editing *ed = BKE_sequencer_editing_get(scene, false);
+
+	/* only enable "use_framerate" if there aren't any existing strips
+	 *  -  When there are no strips yet, there is no harm in enabling this,
+	 *     and it makes the single-strip case really nice for casual users
+	 *  -  When there are strips, it's best we don't touch the framerate,
+	 *     as all hell may break loose (e.g. audio strips start overlapping
+	 *     and can't be restored)
+	 *  -  These initial guesses can still be manually overridden by users
+	 *     from the modal options panel
+	 */
+	if (ed && ed->seqbasep && ed->seqbasep->first) {
+		RNA_boolean_set(op->ptr, "use_framerate", false);
+	}
 
 	/* This is for drag and drop */
 	if ((RNA_struct_property_is_set(op->ptr, "files") && RNA_collection_length(op->ptr, "files")) ||