diff --git a/lib/SILGen/SILGenBridging.cpp b/lib/SILGen/SILGenBridging.cpp
index d169025ea8c..dfa10744406 100644
--- a/lib/SILGen/SILGenBridging.cpp
+++ b/lib/SILGen/SILGenBridging.cpp
@@ -1438,11 +1438,12 @@ emitObjCThunkArguments(SILGenFunction &SGF, SILLocation loc, SILDeclRef thunk,
   // Bridge the input types.
   assert(bridgedArgs.size() == nativeInputs.size() - bool(nativeInputsHasImplicitIsolatedParam));
   for (unsigned i = 0, size = bridgedArgs.size(); i < size; ++i) {
+    unsigned nativeParamIndex = i + nativeInputsHasImplicitIsolatedParam;
     // Consider the bridged values to be "call results" since they're coming
     // from potentially nil-unsound ObjC callers.
     ManagedValue native = SGF.emitBridgedToNativeValue(
         loc, bridgedArgs[i], bridgedFormalTypes[i], nativeFormalTypes[i],
-        swiftFnTy->getParameters()[i].getSILStorageType(
+        swiftFnTy->getParameters()[nativeParamIndex].getSILStorageType(
             SGF.SGM.M, swiftFnTy, SGF.getTypeExpansionContext()),
         SGFContext(),
         /*isCallResult*/ true);
diff --git a/test/Concurrency/attr_execution/nonisolated_nonsending_objc.swift b/test/Concurrency/attr_execution/nonisolated_nonsending_objc.swift
new file mode 100644
index 00000000000..011cd186356
--- /dev/null
+++ b/test/Concurrency/attr_execution/nonisolated_nonsending_objc.swift
@@ -0,0 +1,47 @@
+// RUN: %target-swift-frontend(mock-sdk: %clang-importer-sdk) -emit-silgen -swift-version 6 -enable-upcoming-feature NonisolatedNonsendingByDefault -verify %s | %FileCheck %s
+
+// REQUIRES: swift_feature_NonisolatedNonsendingByDefault
+
+// REQUIRES: concurrency
+// REQUIRES: objc_interop
+
+import Foundation
+
+class Test: NSObject {
+
+  // CHECK: // Test.testExplicit(_:)
+  // CHECK-NEXT: // Isolation: caller_isolation_inheriting
+  // CHECK-LABEL: sil hidden [ossa] @$s27nonisolated_nonsending_objc4TestC12testExplicityyySSYbcYaF : $@convention(method) @async (@sil_isolated @sil_implicit_leading_param @guaranteed Builtin.ImplicitActor, @guaranteed @Sendable @callee_guaranteed (@guaranteed String) -> (), @guaranteed Test) -> ()
+
+  // CHECK: // @objc Test.testExplicit(_:)
+  // CHECK-NEXT: // Isolation: caller_isolation_inheriting
+  // CHECK-LABEL: sil private [thunk] [ossa] @$s27nonisolated_nonsending_objc4TestC12testExplicityyySSYbcYaFTo : $@convention(objc_method) (@convention(block) @Sendable (NSString) -> (), @convention(block) () -> (), Test) -> ()
+
+  // @objc closure #1 in Test.testExplicit(_:)
+  // CHECK-LABEL: sil shared [thunk] [ossa] @$s27nonisolated_nonsending_objc4TestC12testExplicityyySSYbcYaFyyYacfU_To : $@convention(thin) @Sendable @async (@convention(block) @Sendable (NSString) -> (), @convention(block) () -> (), Test) -> () {
+  // CHECK: [[ACTOR:%.*]] = enum $Optional<any Actor>, #Optional.none!enumelt
+  // CHECK: [[BUILTIN_ACTOR:%.*]] = unchecked_value_cast [[ACTOR]] to $Builtin.ImplicitActor
+  // CHECK: [[TEST_EXPLICIT_REF:%.*]] = function_ref @$s27nonisolated_nonsending_objc4TestC12testExplicityyySSYbcYaF : $@convention(method) @async (@sil_isolated @sil_implicit_leading_param @guaranteed Builtin.ImplicitActor, @guaranteed @Sendable @callee_guaranteed (@guaranteed String) -> (), @guaranteed Test) -> ()
+  // CHECK-NEXT: apply [[TEST_EXPLICIT_REF]]([[BUILTIN_ACTOR]], {{.*}}) : $@convention(method) @async (@sil_isolated @sil_implicit_leading_param @guaranteed Builtin.ImplicitActor, @guaranteed @Sendable @callee_guaranteed (@guaranteed String) -> (), @guaranteed Test) -> ()
+  // CHECK: } // end sil function '$s27nonisolated_nonsending_objc4TestC12testExplicityyySSYbcYaFyyYacfU_To'
+  @objc nonisolated(nonsending) func testExplicit(_: @Sendable @escaping (String) -> Void) async {
+  }
+
+  // CHECK: // Test.testImplicit(_:)
+  // CHECK-NEXT: // Isolation: caller_isolation_inheriting
+  // CHECK-LABEL: sil hidden [ossa] @$s27nonisolated_nonsending_objc4TestC12testImplicityyySSYbcYaF : $@convention(method) @async (@sil_isolated @sil_implicit_leading_param @guaranteed Builtin.ImplicitActor, @guaranteed @Sendable @callee_guaranteed (@guaranteed String) -> (), @guaranteed Test) -> ()
+
+  // CHECK: // @objc Test.testImplicit(_:)
+  // CHECK-NEXT: // Isolation: caller_isolation_inheriting
+  // CHECK-LABEL: sil private [thunk] [ossa] @$s27nonisolated_nonsending_objc4TestC12testImplicityyySSYbcYaFTo : $@convention(objc_method) (@convention(block) @Sendable (NSString) -> (), @convention(block) () -> (), Test) -> ()
+
+  // @objc closure #1 in Test.testImplicit(_:)
+  // CHECK-LABEL: sil shared [thunk] [ossa] @$s27nonisolated_nonsending_objc4TestC12testImplicityyySSYbcYaFyyYacfU_To : $@convention(thin) @Sendable @async (@convention(block) @Sendable (NSString) -> (), @convention(block) () -> (), Test) -> () {
+  // CHECK: [[ACTOR:%.*]] = enum $Optional<any Actor>, #Optional.none!enumelt
+  // CHECK: [[BUILTIN_ACTOR:%.*]] = unchecked_value_cast [[ACTOR]] to $Builtin.ImplicitActor
+  // CHECK: [[TEST_IMPLICIT_REF:%.*]] = function_ref @$s27nonisolated_nonsending_objc4TestC12testImplicityyySSYbcYaF : $@convention(method) @async (@sil_isolated @sil_implicit_leading_param @guaranteed Builtin.ImplicitActor, @guaranteed @Sendable @callee_guaranteed (@guaranteed String) -> (), @guaranteed Test) -> ()
+  // CHECK-NEXT: apply [[TEST_IMPLICIT_REF]]([[BUILTIN_ACTOR]], {{.*}}) : $@convention(method) @async (@sil_isolated @sil_implicit_leading_param @guaranteed Builtin.ImplicitActor, @guaranteed @Sendable @callee_guaranteed (@guaranteed String) -> (), @guaranteed Test) -> ()
+  // CHECK: } // end sil function '$s27nonisolated_nonsending_objc4TestC12testImplicityyySSYbcYaFyyYacfU_To'
+  @objc func testImplicit(_: @Sendable @escaping (String) -> Void) async {
+  }
+}