diff --git a/PsychSourceGL/Source/Common/Screen/PsychMovieSupportGStreamer.c b/PsychSourceGL/Source/Common/Screen/PsychMovieSupportGStreamer.c
index 52ec15e5f..2c04498e1 100644
--- a/PsychSourceGL/Source/Common/Screen/PsychMovieSupportGStreamer.c
+++ b/PsychSourceGL/Source/Common/Screen/PsychMovieSupportGStreamer.c
@@ -1287,6 +1287,7 @@ static GstAppSinkCallbacks videosinkCallbacks = {
     PsychNewPrerollCallback,
     PsychNewBufferCallback,
     0,
+    0,
     0
 };
 
diff --git a/PsychSourceGL/Source/Common/Screen/PsychVideoCaptureSupportGStreamer.c b/PsychSourceGL/Source/Common/Screen/PsychVideoCaptureSupportGStreamer.c
index 96e569dd6..a79857dfd 100644
--- a/PsychSourceGL/Source/Common/Screen/PsychVideoCaptureSupportGStreamer.c
+++ b/PsychSourceGL/Source/Common/Screen/PsychVideoCaptureSupportGStreamer.c
@@ -683,6 +683,7 @@ static GstAppSinkCallbacks videosinkCallbacks = {
     PsychNewPrerollCallback,
     PsychNewBufferCallback,
     0,
+    0,
     0
 };