diff --git a/src/kits/media/MediaDefs.cpp b/src/kits/media/MediaDefs.cpp
index 53b372ed21..1ca05e9f3c 100644
--- a/src/kits/media/MediaDefs.cpp
+++ b/src/kits/media/MediaDefs.cpp
@@ -177,13 +177,13 @@ media_multi_audio_format media_raw_audio_format::wildcard;
 
 media_multi_audio_format media_multi_audio_format::wildcard;
 
-media_encoded_audio_format media_encoded_audio_format::wildcard = {0};
+media_encoded_audio_format media_encoded_audio_format::wildcard = {{0}};
 
 media_video_display_info media_video_display_info::wildcard = {(color_space)0};
 
 media_raw_video_format media_raw_video_format::wildcard = {0};
 
-media_encoded_video_format media_encoded_video_format::wildcard = {0};
+media_encoded_video_format media_encoded_video_format::wildcard = {{0}};
 
 media_multistream_format media_multistream_format::wildcard = {0};
 
diff --git a/src/kits/media/MediaEventLooper.cpp b/src/kits/media/MediaEventLooper.cpp
index c74978e7a6..d26eefb53e 100644
--- a/src/kits/media/MediaEventLooper.cpp
+++ b/src/kits/media/MediaEventLooper.cpp
@@ -175,7 +175,7 @@ BMediaEventLooper::ControlLoop()
 {
 	CALLED();
 
-	bool is_realtime;
+	bool is_realtime = false;
 	status_t err;
 	bigtime_t latency;
 	bigtime_t waituntil;
diff --git a/src/kits/media/MediaRoster.cpp b/src/kits/media/MediaRoster.cpp
index 52ec591ea7..c7b63bc9dd 100644
--- a/src/kits/media/MediaRoster.cpp
+++ b/src/kits/media/MediaRoster.cpp
@@ -732,6 +732,7 @@ BMediaRoster::GetAllInputsFor(const media_node & node,
 	port = _PortPool->GetPort();
 	*out_total_count = 0;
 	cookie = 0;
+	rv = B_OK;
 	for (int32 i = 0; i < buf_num_inputs; i++) {
 		xfer_consumer_get_next_input msg;		
 		xfer_consumer_get_next_input_reply reply;
@@ -801,6 +802,7 @@ BMediaRoster::GetAllOutputsFor(const media_node & node,
 	port = _PortPool->GetPort();
 	*out_total_count = 0;
 	cookie = 0;
+	rv = B_OK;
 	for (int32 i = 0; i < buf_num_outputs; i++) {
 		xfer_producer_get_next_output msg;		
 		xfer_producer_get_next_output_reply reply;