diff --git a/lib/Format/UnwrappedLineParser.cpp b/lib/Format/UnwrappedLineParser.cpp
index 1d0cb30..c049ac6 100644
--- a/lib/Format/UnwrappedLineParser.cpp
+++ b/lib/Format/UnwrappedLineParser.cpp
@@ -209,7 +209,8 @@
     case tok::objc_private:
       return parseAccessSpecifier();
     case tok::objc_interface:
-      return parseObjCInterface();
+    case tok::objc_implementation:
+      return parseObjCInterfaceOrImplementation();
     case tok::objc_protocol:
       return parseObjCProtocol();
     case tok::objc_end:
@@ -519,7 +520,7 @@
   } while (!eof());
 }
 
-void UnwrappedLineParser::parseObjCInterface() {
+void UnwrappedLineParser::parseObjCInterfaceOrImplementation() {
   nextToken();
   nextToken();  // interface name
 
diff --git a/lib/Format/UnwrappedLineParser.h b/lib/Format/UnwrappedLineParser.h
index 303afc2..16ad37e 100644
--- a/lib/Format/UnwrappedLineParser.h
+++ b/lib/Format/UnwrappedLineParser.h
@@ -144,7 +144,7 @@
   void parseStructOrClass();
   void parseObjCProtocolList();
   void parseObjCUntilAtEnd();
-  void parseObjCInterface();
+  void parseObjCInterfaceOrImplementation();
   void parseObjCProtocol();
   void addUnwrappedLine();
   bool eof() const;
diff --git a/test/Index/comment-objc-decls.m b/test/Index/comment-objc-decls.m
index 4c9f878..c61d995 100644
--- a/test/Index/comment-objc-decls.m
+++ b/test/Index/comment-objc-decls.m
@@ -162,7 +162,7 @@
 */
 - (void) setPropertyMyClassCategory : (id) arg {}
 @end
-// CHECK: <Declaration>@implementation MyClass(Category)  @end</Declaration>
+// CHECK: <Declaration>@implementation MyClass(Category)\n@end</Declaration>
 // CHECK: <Declaration>- (void)MethodMyClassCategory;</Declaration>
 // CHECK: <Declaration>- (id)PropertyMyClassCategory;</Declaration>
 // CHECK: <Declaration>- (void)setPropertyMyClassCategory:(id)arg;</Declaration>
@@ -172,4 +172,4 @@
 */
 @implementation NSObject
 @end
-// CHECK: <Declaration>@implementation NSObject @end</Declaration>
+// CHECK: <Declaration>@implementation NSObject\n@end</Declaration>
diff --git a/unittests/Format/FormatTest.cpp b/unittests/Format/FormatTest.cpp
index 15fe9aa..b536e01 100644
--- a/unittests/Format/FormatTest.cpp
+++ b/unittests/Format/FormatTest.cpp
@@ -1251,6 +1251,77 @@
                "@end");
 }
 
+TEST_F(FormatTest, FormatObjCImplementation) {
+  verifyFormat("@implementation Foo : NSObject {\n"
+               "@public\n"
+               "  int field1;\n"
+               "@protected\n"
+               "  int field2;\n"
+               "@private\n"
+               "  int field3;\n"
+               "@package\n"
+               "  int field4;\n"
+               "}\n"
+               "+ (id)init {\n"
+               "}\n"
+               "@end");
+
+  verifyGoogleFormat("@implementation Foo : NSObject {\n"
+                     " @public\n"
+                     "  int field1;\n"
+                     " @protected\n"
+                     "  int field2;\n"
+                     " @private\n"
+                     "  int field3;\n"
+                     " @package\n"
+                     "  int field4;\n"
+                     "}\n"
+                     "+ (id)init {\n"
+                     "}\n"
+                     "@end");
+
+  verifyFormat("@implementation Foo\n"
+               "+ (id)init {\n"
+               "  if (true)\n"
+               "    return nil;\n"
+               "}\n"
+               "// Look, a comment!\n"
+               "- (int)answerWith:(int)i {\n"
+               "  return i;\n"
+               "}\n"
+               "@end");
+
+  verifyFormat("@implementation Foo\n"
+               "@end\n"
+               "@implementation Bar\n"
+               "@end");
+
+  verifyFormat("@implementation Foo : Bar\n"
+               "+ (id)init {\n"
+               "}\n"
+               "@end");
+
+  verifyFormat("@implementation Foo {\n"
+               "  int _i;\n"
+               "}\n"
+               "+ (id)init {\n"
+               "}\n"
+               "@end");
+
+  verifyFormat("@implementation Foo : Bar {\n"
+               "  int _i;\n"
+               "}\n"
+               "+ (id)init {\n"
+               "}\n"
+               "@end");
+
+  // FIXME: there should be a space before '(' for categories.
+  verifyFormat("@implementation Foo(HackStuff)\n"
+               "+ (id)init {\n"
+               "}\n"
+               "@end");
+}
+
 TEST_F(FormatTest, FormatObjCProtocol) {
   verifyFormat("@protocol Foo\n"
                "@property(weak) id delegate;\n"