diff --git a/crates/flux-infer/src/projections.rs b/crates/flux-infer/src/projections.rs
index 0efa6b040d..b24ea27b17 100644
--- a/crates/flux-infer/src/projections.rs
+++ b/crates/flux-infer/src/projections.rs
@@ -804,6 +804,12 @@ fn normalize_alias_reft<'tcx>(
     let trait_ref = alias_reft.to_rustc_trait_ref(tcx);
     let trait_ref = tcx.erase_and_anonymize_regions(trait_ref);
     let trait_pred = Obligation::new(tcx, ObligationCause::dummy(), param_env, trait_ref);
+
+    let pred: rustc_type_ir::TraitPredicate<TyCtxt<'tcx>> = trait_pred.predicate;
+    if matches!(pred.self_ty().kind(), rustc_middle::ty::Dynamic(_, _)) {
+        return Ok((false, Expr::alias(alias_reft.clone(), refine_args.clone())));
+    }
+
     let impl_source = selcx
         .select(&trait_pred)
         .map_err(|e| query_bug!("error selecting {trait_pred:?}: {e:?}"))?;
diff --git a/tests/tests/pos/surface/no_panic07.rs b/tests/tests/pos/surface/no_panic07.rs
new file mode 100644
index 0000000000..0991e5ba35
--- /dev/null
+++ b/tests/tests/pos/surface/no_panic07.rs
@@ -0,0 +1,17 @@
+#[flux::assoc(fn blueberry_no_panic() -> bool)]
+pub trait MyTrait<'a> {
+    #[flux::sig(fn(&Self) -> ())]
+    #[flux::no_panic_if(Self::blueberry_no_panic())]
+    fn blueberry(&self) {
+        let x = 3;
+    }
+}
+
+pub struct MyStruct<'a> {
+    field: &'a dyn MyTrait<'a>,
+}
+
+#[flux::no_panic_if(MyTrait::blueberry_no_panic())]
+fn foo(s: &MyStruct) {
+    s.field.blueberry();
+}