diff --git a/src/tools/rust-analyzer/crates/hir-def/src/expr_store.rs b/src/tools/rust-analyzer/crates/hir-def/src/expr_store.rs
index 75278f778b88..1c496cbc59e8 100644
--- a/src/tools/rust-analyzer/crates/hir-def/src/expr_store.rs
+++ b/src/tools/rust-analyzer/crates/hir-def/src/expr_store.rs
@@ -675,6 +675,9 @@ pub fn walk_child_exprs(&self, expr_id: ExprId, mut f: impl FnMut(ExprId)) {
                 f(*expr);
                 arms.iter().for_each(|arm| {
                     f(arm.expr);
+                    if let Some(guard) = arm.guard {
+                        f(guard);
+                    }
                     self.walk_exprs_in_pat(arm.pat, &mut f);
                 });
             }