diff --git a/main/frame.c b/main/frame.c
index 3971393fd2780d26f1c79cab9e22e41e9146307f..07ce936f2cbdae9092fc5bcc88ed222b5f22200a 100644
--- a/main/frame.c
+++ b/main/frame.c
@@ -85,6 +85,7 @@ struct ast_smoother {
 	int size;
 	int format;
 	int readdata;
+	int optimizablestream;
 	int flags;
 	float samplesperbyte;
 	struct ast_frame f;