diff --git a/main/frame.c b/main/frame.c
index d26c607e2f..5c4613f4d2 100644
--- a/main/frame.c
+++ b/main/frame.c
@@ -92,6 +92,7 @@ struct ast_smoother {
 	int size;
 	int format;
 	int readdata;
+	int optimizablestream;
 	int flags;
 	float samplesperbyte;
 	struct ast_frame f;