Index: lib/Format/TokenAnnotator.cpp
===================================================================
--- lib/Format/TokenAnnotator.cpp
+++ lib/Format/TokenAnnotator.cpp
@@ -1900,7 +1900,8 @@
     return Line.Type == LT_ObjCDecl || Left.is(tok::semi) ||
            (Style.SpaceBeforeParens != FormatStyle::SBPO_Never &&
             (Left.isOneOf(tok::kw_if, tok::pp_elif, tok::kw_for, tok::kw_while,
-                          tok::kw_switch, tok::kw_case, TT_ForEachMacro) ||
+                          tok::kw_switch, tok::kw_case, TT_ForEachMacro,
+                          TT_ObjCForIn) ||
              (Left.isOneOf(tok::kw_try, Keywords.kw___except, tok::kw_catch,
                            tok::kw_new, tok::kw_delete) &&
               (!Left.Previous || Left.Previous->isNot(tok::period))))) ||
Index: unittests/Format/FormatTest.cpp
===================================================================
--- unittests/Format/FormatTest.cpp
+++ unittests/Format/FormatTest.cpp
@@ -7430,6 +7430,19 @@
                "@import baz;");
 }
 
+TEST_F(FormatTest, ObjCForIn) {
+  verifyFormat("- (void)test {\n"
+               "  for (NSString *n in arrayOfStrings) {\n"
+               "    foo(n);\n"
+               "  }\n"
+               "}");
+  verifyFormat("- (void)test {\n"
+               "  for (NSString *n in (__bridge NSArray *)arrayOfStrings) {\n"
+               "    foo(n);\n"
+               "  }\n"
+               "}");
+}
+
 TEST_F(FormatTest, ObjCLiterals) {
   verifyFormat("@\"String\"");
   verifyFormat("@1");