diff --git a/src/output/plugins/OSXOutputPlugin.cxx b/src/output/plugins/OSXOutputPlugin.cxx
index af4ad56d3..5ee21e9ff 100644
--- a/src/output/plugins/OSXOutputPlugin.cxx
+++ b/src/output/plugins/OSXOutputPlugin.cxx
@@ -418,7 +418,7 @@ osx_output_set_device_format(AudioDeviceID dev_id,
 						      &aopa_device_streams,
 						      0, NULL, &property_size);
 	if (err != noErr)
-		throw FormatRuntimeError("Cannot get number of streams: %d\n", err);
+		throw FormatRuntimeError("Cannot get number of streams: %d", err);
 
 	const size_t n_streams = property_size / sizeof(AudioStreamID);
 	static constexpr size_t MAX_STREAMS = 64;
@@ -429,7 +429,7 @@ osx_output_set_device_format(AudioDeviceID dev_id,
 	err = AudioObjectGetPropertyData(dev_id, &aopa_device_streams, 0, NULL,
 					 &property_size, streams);
 	if (err != noErr)
-		throw FormatRuntimeError("Cannot get streams: %d\n", err);
+		throw FormatRuntimeError("Cannot get streams: %d", err);
 
 	bool format_found = false;
 	int output_stream;
@@ -446,7 +446,7 @@ osx_output_set_device_format(AudioDeviceID dev_id,
 						 &property_size,
 						 &direction);
 		if (err != noErr)
-			throw FormatRuntimeError("Cannot get streams direction: %d\n",
+			throw FormatRuntimeError("Cannot get streams direction: %d",
 						 err);
 
 		if (direction != 0)
@@ -507,7 +507,7 @@ osx_output_set_device_format(AudioDeviceID dev_id,
 						 sizeof(output_format),
 						 &output_format);
 		if (err != noErr)
-			throw FormatRuntimeError("Failed to change the stream format: %d\n",
+			throw FormatRuntimeError("Failed to change the stream format: %d",
 						 err);
 	}