diff --git a/components/freertos/ringbuf.c b/components/freertos/ringbuf.c
index 7074eb537..e49b8e5ef 100644
--- a/components/freertos/ringbuf.c
+++ b/components/freertos/ringbuf.c
@@ -600,7 +600,7 @@ void *xRingbufferReceiveUpToFromISR(RingbufHandle_t ringbuf, size_t *item_size,
     configASSERT(rb);
     configASSERT(rb->flags & flag_bytebuf);
     portENTER_CRITICAL_ISR(&rb->mux);
-    itemData=rb->getItemFromRingbufImpl(rb, item_size, 0);
+    itemData=rb->getItemFromRingbufImpl(rb, item_size, wanted_size);
     portEXIT_CRITICAL_ISR(&rb->mux);
     return (void*)itemData;
 }