diff --git a/compiler/rustc_mir_dataflow/src/framework/cursor.rs b/compiler/rustc_mir_dataflow/src/framework/cursor.rs
index c978bddfef5..6285199e5b6 100644
--- a/compiler/rustc_mir_dataflow/src/framework/cursor.rs
+++ b/compiler/rustc_mir_dataflow/src/framework/cursor.rs
@@ -147,7 +147,7 @@ pub(crate) fn allow_unreachable(&mut self) {
     }
 
     /// Returns the underlying `Results`.
-    pub fn results(&mut self) -> &Results<'tcx, A, R::EntrySets> {
+    pub fn results(&self) -> &Results<'tcx, A, R::EntrySets> {
         self.results.borrow()
     }