diff --git a/lib/Sema/SemaDeclObjC.cpp b/lib/Sema/SemaDeclObjC.cpp
index fb2cc712dc..115a433303 100644
--- a/lib/Sema/SemaDeclObjC.cpp
+++ b/lib/Sema/SemaDeclObjC.cpp
@@ -1473,8 +1473,11 @@ void Sema::ProcessPropertyDecl(ObjCPropertyDecl *property,
                                    property->getLocation());
 
   if (SetterMethod) {
-    if (Context.getCanonicalType(SetterMethod->getResultType())
-        != Context.VoidTy)
+    ObjCPropertyDecl::PropertyAttributeKind CAttr = 
+      property->getPropertyAttributes();
+    if ((!(CAttr & ObjCPropertyDecl::OBJC_PR_readonly)) &&
+        Context.getCanonicalType(SetterMethod->getResultType()) != 
+          Context.VoidTy)
       Diag(SetterMethod->getLocation(), diag::err_setter_type_void);
     if (SetterMethod->param_size() != 1 ||
         ((*SetterMethod->param_begin())->getType() != property->getType())) {
diff --git a/test/SemaObjC/property-9.m b/test/SemaObjC/property-9.m
index 138f09953d..d527a9c9f3 100644
--- a/test/SemaObjC/property-9.m
+++ b/test/SemaObjC/property-9.m
@@ -84,3 +84,15 @@ typedef signed char BOOL;
   view.inEyeDropperMode = 1;
 }
 @end
+
+// radar 7427072
+@interface MyStyleIntf 
+{
+    int _myStyle;
+}
+
+@property(readonly) int myStyle;
+
+- (float)setMyStyle:(int)style;
+@end
+