diff --git a/include/clang/AST/DeclBase.h b/include/clang/AST/DeclBase.h
index 3575faa..257ed25 100644
--- a/include/clang/AST/DeclBase.h
+++ b/include/clang/AST/DeclBase.h
@@ -62,6 +62,7 @@
          ObjCMethod,
          ObjCClass,
          ObjCForwardProtocol,
+         ObjCPropertyImpl,
          LinkageSpec,
    FileScopeAsm,
   
diff --git a/include/clang/AST/DeclObjC.h b/include/clang/AST/DeclObjC.h
index 89261d9..80634fe 100644
--- a/include/clang/AST/DeclObjC.h
+++ b/include/clang/AST/DeclObjC.h
@@ -999,5 +999,45 @@
   static bool classof(const ObjCPropertyDecl *D) { return true; }
 };
 
+/// ObjCPropertyImplDecl - Represents implementation declaration of a property 
+/// in a class or category implementation block. For example:
+/// @synthesize prop1 = ivar1;
+///
+class ObjCPropertyImplDecl : public Decl {
+public:
+  enum PropertyImplKind {
+    OBJC_PR_IMPL_None,
+    OBJC_PR_IMPL_SYNTHSIZE,
+    OBJC_PR_IMPL_DYNAMIC
+  };
+private:
+  /// Property declaration being implemented
+  ObjCPropertyDecl *PropertyDecl;
+  PropertyImplKind PropertyImplementation;
+  /// Null for @dynamic. Required for @synthesize.
+  ObjCIvarDecl *PropertyIvarDecl;
+public:
+  ObjCPropertyImplDecl(SourceLocation L)
+  : Decl(ObjCPropertyImpl, L), PropertyDecl(0), 
+  PropertyImplementation(OBJC_PR_IMPL_None), PropertyIvarDecl(0) {}
+
+  void setPropertyDecl(ObjCPropertyDecl *property) { PropertyDecl = property; }
+  ObjCPropertyDecl *getPropertyDecl() const { return PropertyDecl; }
+  
+  void setImplKind (PropertyImplKind propImplKind) 
+    { PropertyImplementation = propImplKind; }
+  PropertyImplKind getPropertyImplementation() const 
+    { return PropertyImplementation; }
+  
+  void setPropertyIvarDecl(ObjCIvarDecl *ivarDecl) 
+    { PropertyIvarDecl = ivarDecl; }
+  ObjCIvarDecl *getPropertyIvarDecl() { return PropertyIvarDecl; }
+  
+  static bool classof(const Decl *D) {
+    return D->getKind() == ObjCPropertyImpl;
+  }
+  static bool classof(const ObjCPropertyImplDecl *D) { return true; }  
+};
+
 }  // end namespace clang
 #endif
diff --git a/lib/AST/Decl.cpp b/lib/AST/Decl.cpp
index cee7dda..900096f 100644
--- a/lib/AST/Decl.cpp
+++ b/lib/AST/Decl.cpp
@@ -42,6 +42,7 @@
 static unsigned nObjCCategoryImpl = 0;
 static unsigned nObjCCompatibleAlias = 0;
 static unsigned nObjCPropertyDecl = 0;
+static unsigned nObjCPropertyImplDecl = 0;
 static unsigned nLinkageSpecDecl = 0;
 static unsigned nFileScopeAsmDecl = 0;
 
@@ -146,6 +147,10 @@
           nObjCPropertyDecl, (int)sizeof(ObjCPropertyDecl),
           int(nObjCPropertyDecl*sizeof(ObjCPropertyDecl)));
   
+  fprintf(stderr, "    %d property implementation decls, %d each (%d bytes)\n", 
+          nObjCPropertyImplDecl, (int)sizeof(ObjCPropertyImplDecl),
+          int(nObjCPropertyImplDecl*sizeof(ObjCPropertyImplDecl)));
+  
   fprintf(stderr, "Total bytes = %d\n", 
           int(nFuncs*sizeof(FunctionDecl)+
               nVars*sizeof(VarDecl)+nParmVars*sizeof(ParmVarDecl)+
@@ -163,6 +168,7 @@
               nObjCCategoryImpl*sizeof(ObjCCategoryImplDecl)+
               nObjCCompatibleAlias*sizeof(ObjCCompatibleAliasDecl)+
               nObjCPropertyDecl*sizeof(ObjCPropertyDecl)+
+              nObjCPropertyImplDecl*sizeof(ObjCPropertyImplDecl)+
               nLinkageSpecDecl*sizeof(LinkageSpecDecl)+
               nFileScopeAsmDecl*sizeof(FileScopeAsmDecl)));
     
@@ -189,6 +195,7 @@
   case ObjCCategoryImpl:    nObjCCategoryImpl++; break;
   case ObjCCompatibleAlias: nObjCCompatibleAlias++; break;
   case ObjCProperty:        nObjCPropertyDecl++; break;
+  case ObjCPropertyImpl:    nObjCPropertyImplDecl++; break;
   case LinkageSpec:         nLinkageSpecDecl++; break;
   case FileScopeAsm:        nFileScopeAsmDecl++; break;
   }