diff --git a/main/abstract_jb.c b/main/abstract_jb.c
index 7ebbb628b7f7f76cece22b619708e1bc3124b68f..dd159c1f05a4cdfe61d030c2d26279690fbfe624 100644
--- a/main/abstract_jb.c
+++ b/main/abstract_jb.c
@@ -386,7 +386,7 @@ static void jb_get_and_deliver(struct ast_channel *chan)
 	struct ast_jb *jb = &chan->jb;
 	const struct ast_jb_impl *jbimpl = jb->impl;
 	void *jbobj = jb->jbobj;
-	struct ast_frame *f, finterp;
+	struct ast_frame *f, finterp = { .frametype = AST_FRAME_VOICE, };
 	long now;
 	int interpolation_len, res;
 
@@ -415,13 +415,9 @@ static void jb_get_and_deliver(struct ast_channel *chan)
 		case JB_IMPL_INTERP:
 			/* interpolate a frame */
 			f = &finterp;
-			f->frametype = AST_FRAME_VOICE;
 			f->subclass.codec = jb->last_format;
-			f->datalen  = 0;
 			f->samples  = interpolation_len * 8;
-			f->mallocd  = 0;
 			f->src  = "JB interpolation";
-			f->data.ptr  = NULL;
 			f->delivery = ast_tvadd(jb->timebase, ast_samp2tv(jb->next, 1000));
 			f->offset = AST_FRIENDLY_OFFSET;
 			/* deliver the interpolated frame */