diff --git a/gstreamer-video/src/video_time_code.rs b/gstreamer-video/src/video_time_code.rs
index a46807dfa..4d9005941 100644
--- a/gstreamer-video/src/video_time_code.rs
+++ b/gstreamer-video/src/video_time_code.rs
@@ -16,8 +16,10 @@ use crate::VideoTimeCodeFlags;
 use crate::VideoTimeCodeInterval;
 
 #[doc(alias = "GstVideoTimeCode")]
+#[repr(transparent)]
 pub struct VideoTimeCode(ffi::GstVideoTimeCode);
 #[doc(alias = "GstVideoTimeCode")]
+#[repr(transparent)]
 pub struct ValidVideoTimeCode(ffi::GstVideoTimeCode);
 
 impl VideoTimeCode {