diff --git a/crates/egui-wgpu/src/capture.rs b/crates/egui-wgpu/src/capture.rs
index 193cb4cce..c5519e8a6 100644
--- a/crates/egui-wgpu/src/capture.rs
+++ b/crates/egui-wgpu/src/capture.rs
@@ -230,6 +230,7 @@ impl CaptureState {
                     ));
                 }
             }
+            drop(mapped_range);
             buffer.unmap();
 
             tx.send((