diff --git a/UI/window-basic-main-outputs.cpp b/UI/window-basic-main-outputs.cpp
index ebd335fe6..f7e62edc2 100644
--- a/UI/window-basic-main-outputs.cpp
+++ b/UI/window-basic-main-outputs.cpp
@@ -1330,6 +1330,7 @@ bool SimpleOutput::ConfigureRecording(bool updateReplayBuffer)
 		config_get_int(main->Config(), "SimpleOutput", "RecTracks");
 
 	bool is_fragmented = strncmp(format, "fragmented", 10) == 0;
+	bool is_lossless = videoQuality == "Lossless";
 
 	string f;
 
@@ -1356,7 +1357,8 @@ bool SimpleOutput::ConfigureRecording(bool updateReplayBuffer)
 	}
 
 	// Use fragmented MOV/MP4 if user has not already specified custom movflags
-	if (is_fragmented && (!mux || strstr(mux, "movflags") == NULL)) {
+	if (is_fragmented && !is_lossless &&
+	    (!mux || strstr(mux, "movflags") == NULL)) {
 		string mux_frag =
 			"movflags=frag_keyframe+empty_moov+delay_moov";
 		if (mux) {
@@ -1366,7 +1368,7 @@ bool SimpleOutput::ConfigureRecording(bool updateReplayBuffer)
 		obs_data_set_string(settings, "muxer_settings",
 				    mux_frag.c_str());
 	} else {
-		if (is_fragmented)
+		if (is_fragmented && !is_lossless)
 			blog(LOG_WARNING,
 			     "User enabled fragmented recording, "
 			     "but custom muxer settings contained movflags.");