diff --git a/src/tools/rust-analyzer/crates/ide-assists/src/handlers/unwrap_tuple.rs b/src/tools/rust-analyzer/crates/ide-assists/src/handlers/unwrap_tuple.rs
index 2345075a52be..e03274bbb3c9 100644
--- a/src/tools/rust-analyzer/crates/ide-assists/src/handlers/unwrap_tuple.rs
+++ b/src/tools/rust-analyzer/crates/ide-assists/src/handlers/unwrap_tuple.rs
@@ -33,7 +33,7 @@ pub(crate) fn unwrap_tuple(acc: &mut Assists, ctx: &AssistContext<'_>) -> Option
     let (ty, init, prefix, suffix) = match &let_stmt {
         Either::Left(let_stmt) => (let_stmt.ty(), let_stmt.initializer()?, "", ";"),
         Either::Right(let_expr) => {
-            indent_level = indent_level + 1;
+            indent_level += 1;
             (None, let_expr.expr()?, "&& ", "")
         }
     };
diff --git a/src/tools/rust-analyzer/crates/ide-diagnostics/src/handlers/remove_unnecessary_else.rs b/src/tools/rust-analyzer/crates/ide-diagnostics/src/handlers/remove_unnecessary_else.rs
index 7dc5b5b45e5f..04f48ae3db17 100644
--- a/src/tools/rust-analyzer/crates/ide-diagnostics/src/handlers/remove_unnecessary_else.rs
+++ b/src/tools/rust-analyzer/crates/ide-diagnostics/src/handlers/remove_unnecessary_else.rs
@@ -48,7 +48,7 @@ fn fixes(ctx: &DiagnosticsContext<'_>, d: &RemoveUnnecessaryElse) -> Option<Vec<
     let mut indent = IndentLevel::from_node(if_expr.syntax());
     let has_parent_if_expr = if_expr.syntax().parent().and_then(ast::IfExpr::cast).is_some();
     if has_parent_if_expr {
-        indent = indent + 1;
+        indent += 1;
     }
     let else_replacement = match if_expr.else_branch()? {
         ast::ElseBranch::Block(block) => block
diff --git a/src/tools/rust-analyzer/crates/syntax/src/ast/edit.rs b/src/tools/rust-analyzer/crates/syntax/src/ast/edit.rs
index 9b30642fe4b0..194d06900a48 100644
--- a/src/tools/rust-analyzer/crates/syntax/src/ast/edit.rs
+++ b/src/tools/rust-analyzer/crates/syntax/src/ast/edit.rs
@@ -43,6 +43,12 @@ fn add(self, rhs: u8) -> IndentLevel {
     }
 }
 
+impl ops::AddAssign<u8> for IndentLevel {
+    fn add_assign(&mut self, rhs: u8) {
+        self.0 += rhs;
+    }
+}
+
 impl IndentLevel {
     pub fn single() -> IndentLevel {
         IndentLevel(0)