diff --git a/gstreamer-editing-services/src/lib.rs b/gstreamer-editing-services/src/lib.rs
index 8bb9d5f95..c2d8864ab 100644
--- a/gstreamer-editing-services/src/lib.rs
+++ b/gstreamer-editing-services/src/lib.rs
@@ -43,6 +43,12 @@ pub fn init() -> Result<(), glib::BoolError> {
     }
 }
 
+/// Deinitialize GStreamer Editing Services
+///
+/// # Safety
+///
+/// This must only be called once during the lifetime of the process, once no GStreamer threads
+/// are running anymore and all GStreamer resources are released.
 pub unsafe fn deinit() {
     ges_sys::ges_deinit();
 }
diff --git a/gstreamer/src/lib.rs b/gstreamer/src/lib.rs
index 54452d33d..35db7fe0e 100644
--- a/gstreamer/src/lib.rs
+++ b/gstreamer/src/lib.rs
@@ -292,6 +292,12 @@ pub fn init() -> Result<(), glib::Error> {
     }
 }
 
+/// Deinitialize GStreamer
+///
+/// # Safety
+///
+/// This must only be called once during the lifetime of the process, once no GStreamer threads
+/// are running anymore and all GStreamer resources are released.
 pub unsafe fn deinit() {
     gst_sys::gst_deinit();
 }