diff --git a/src/Messages/Attachments/TSAttachmentStream.h b/src/Messages/Attachments/TSAttachmentStream.h
index 6e4439b52..63b33bcd9 100644
--- a/src/Messages/Attachments/TSAttachmentStream.h
+++ b/src/Messages/Attachments/TSAttachmentStream.h
@@ -31,6 +31,7 @@ NS_ASSUME_NONNULL_BEGIN
 - (BOOL)isAnimated;
 - (BOOL)isImage;
 - (BOOL)isVideo;
+- (BOOL)isAudio;
 - (nullable NSString *)filePath;
 - (nullable NSURL *)mediaURL;
 - (nullable NSData *)readDataFromFileWithError:(NSError **)error;