diff --git a/crates/ide_completion/src/render.rs b/crates/ide_completion/src/render.rs
index 1f4a8173ae..0c1169ecbd 100644
--- a/crates/ide_completion/src/render.rs
+++ b/crates/ide_completion/src/render.rs
@@ -1082,7 +1082,7 @@ impl Deref for T {
 }
 
 impl DerefMut for T {
-    fn deref_mut(&self) -> &mut Self::Target {
+    fn deref_mut(&mut self) -> &mut Self::Target {
         &mut self.0
     }
 }