diff --git a/headers/os/media/BufferConsumer.h b/headers/os/media/BufferConsumer.h
index 3249f40b36..2bbff23361 100644
--- a/headers/os/media/BufferConsumer.h
+++ b/headers/os/media/BufferConsumer.h
@@ -100,7 +100,7 @@ virtual	status_t HandleMessage(
 	/* reply. */
 virtual	status_t AcceptFormat(
 				const media_destination & dest,
-				media_format * format) = 0;
+				media_format * ioFormat) = 0;
 virtual	status_t GetNextInput(
 				int32 * cookie,
 				media_input * out_input) = 0;
diff --git a/headers/os/media/BufferProducer.h b/headers/os/media/BufferProducer.h
index 6fa6e3e2a1..7c0fbf0570 100644
--- a/headers/os/media/BufferProducer.h
+++ b/headers/os/media/BufferProducer.h
@@ -56,7 +56,7 @@ virtual	status_t FormatSuggestionRequested(
 				media_format * format) = 0;
 virtual	status_t FormatProposal(
 				const media_source & output,
-				media_format * format) = 0;
+				media_format * ioFormat) = 0;
 	/* If the format isn't good, put a good format into *io_format and return error */
 	/* If format has wildcard, specialize to what you can do (and change). */
 	/* If you can change the format, return OK. */