diff --git a/clang/lib/Rewrite/RewriteModernObjC.cpp b/clang/lib/Rewrite/RewriteModernObjC.cpp
index 78e0dbce7c17..648bce7be2e8 100644
--- a/clang/lib/Rewrite/RewriteModernObjC.cpp
+++ b/clang/lib/Rewrite/RewriteModernObjC.cpp
@@ -5162,15 +5162,15 @@ void RewriteModernObjC::Initialize(ASTContext &context) {
   Preamble += "(struct objc_class *);\n";
   Preamble += "__OBJC_RW_DLLIMPORT struct objc_object *objc_getMetaClass";
   Preamble += "(const char *);\n";
-  Preamble += "__OBJC_RW_DLLIMPORT void objc_exception_throw(id);\n";
+  Preamble += "__OBJC_RW_DLLIMPORT void objc_exception_throw( struct objc_object *);\n";
   Preamble += "__OBJC_RW_DLLIMPORT void objc_exception_try_enter(void *);\n";
   Preamble += "__OBJC_RW_DLLIMPORT void objc_exception_try_exit(void *);\n";
   Preamble += "__OBJC_RW_DLLIMPORT struct objc_object *objc_exception_extract(void *);\n";
   Preamble += "__OBJC_RW_DLLIMPORT int objc_exception_match";
   Preamble += "(struct objc_class *, struct objc_object *);\n";
   // @synchronized hooks.
-  Preamble += "__OBJC_RW_DLLIMPORT void objc_sync_enter(id);\n";
-  Preamble += "__OBJC_RW_DLLIMPORT void objc_sync_exit(id);\n";
+  Preamble += "__OBJC_RW_DLLIMPORT void objc_sync_enter( struct objc_object *);\n";
+  Preamble += "__OBJC_RW_DLLIMPORT void objc_sync_exit( struct objc_object *);\n";
   Preamble += "__OBJC_RW_DLLIMPORT Protocol *objc_getProtocol(const char *);\n";
   Preamble += "#ifndef __FASTENUMERATIONSTATE\n";
   Preamble += "struct __objcFastEnumerationState {\n\t";
diff --git a/clang/test/Rewriter/rewrite-modern-synchronized.m b/clang/test/Rewriter/rewrite-modern-synchronized.m
index 6dbba9a18c74..e89533930388 100644
--- a/clang/test/Rewriter/rewrite-modern-synchronized.m
+++ b/clang/test/Rewriter/rewrite-modern-synchronized.m
@@ -1,5 +1,10 @@
 // RUN: %clang_cc1 -x objective-c -Wno-return-type -fblocks -fms-extensions -rewrite-objc %s -o %t-rw.cpp
-// RUN: %clang_cc1 -fsyntax-only -fcxx-exceptions -fexceptions  -Wno-address-of-temporary -D"id=void*" -D"SEL=void*" -D"__declspec(X)=" %t-rw.cpp
+// RUN: %clang_cc1 -fsyntax-only -fcxx-exceptions -fexceptions  -Wno-address-of-temporary -D"SEL=void*" -D"__declspec(X)=" %t-rw.cpp
+
+typedef struct objc_class *Class;
+typedef struct objc_object {
+    Class isa;
+} *id;
 
 void *sel_registerName(const char *);
 
diff --git a/clang/test/Rewriter/rewrite-modern-throw.m b/clang/test/Rewriter/rewrite-modern-throw.m
index 96d0e1c9ec43..191238443d3d 100644
--- a/clang/test/Rewriter/rewrite-modern-throw.m
+++ b/clang/test/Rewriter/rewrite-modern-throw.m
@@ -1,5 +1,10 @@
 // RUN: %clang_cc1 -x objective-c -Wno-return-type -fblocks -fms-extensions -rewrite-objc %s -o %t-rw.cpp
-// RUN: %clang_cc1 -fsyntax-only -fcxx-exceptions -fexceptions  -Wno-address-of-temporary -D"id=void*" -D"SEL=void*" -D"__declspec(X)=" %t-rw.cpp
+// RUN: %clang_cc1 -fsyntax-only -fcxx-exceptions -fexceptions  -Wno-address-of-temporary -D"SEL=void*" -D"__declspec(X)=" %t-rw.cpp
+
+typedef struct objc_class *Class;
+typedef struct objc_object {
+    Class isa;
+} *id;
 
 void *sel_registerName(const char *);
 
diff --git a/clang/test/Rewriter/rewrite-modern-try-catch-finally.m b/clang/test/Rewriter/rewrite-modern-try-catch-finally.m
index 5b222fdd21b1..9beab7d75100 100644
--- a/clang/test/Rewriter/rewrite-modern-try-catch-finally.m
+++ b/clang/test/Rewriter/rewrite-modern-try-catch-finally.m
@@ -1,5 +1,10 @@
 // RUN: %clang_cc1 -x objective-c -Wno-return-type -fblocks -fms-extensions -rewrite-objc %s -o %t-rw.cpp
-// RUN: %clang_cc1 -fsyntax-only -fcxx-exceptions -fexceptions  -Wno-address-of-temporary -D"id=void*" -D"SEL=void*" -D"__declspec(X)=" %t-rw.cpp
+// RUN: %clang_cc1 -fsyntax-only -fcxx-exceptions -fexceptions  -Wno-address-of-temporary -D"SEL=void*" -D"__declspec(X)=" %t-rw.cpp
+
+typedef struct objc_class *Class;
+typedef struct objc_object {
+    Class isa;
+} *id;
 
 extern int printf(const char *, ...);
 
diff --git a/clang/test/Rewriter/rewrite-modern-try-finally.m b/clang/test/Rewriter/rewrite-modern-try-finally.m
index cf342d746de7..500133b86142 100644
--- a/clang/test/Rewriter/rewrite-modern-try-finally.m
+++ b/clang/test/Rewriter/rewrite-modern-try-finally.m
@@ -1,5 +1,10 @@
 // RUN: %clang_cc1 -x objective-c -Wno-return-type -fblocks -fms-extensions -rewrite-objc %s -o %t-rw.cpp
-// RUN: %clang_cc1 -fsyntax-only -fcxx-exceptions -fexceptions  -Wno-address-of-temporary -D"id=void*" -D"SEL=void*" -D"__declspec(X)=" %t-rw.cpp
+// RUN: %clang_cc1 -fsyntax-only -fcxx-exceptions -fexceptions  -Wno-address-of-temporary -D"SEL=void*" -D"__declspec(X)=" %t-rw.cpp
+
+typedef struct objc_class *Class;
+typedef struct objc_object {
+    Class isa;
+} *id;
 
 void FINALLY();
 void TRY();