diff --git a/clang/include/clang/Basic/DiagnosticSemaKinds.td b/clang/include/clang/Basic/DiagnosticSemaKinds.td
index f61cd2179556..435880fdca16 100644
--- a/clang/include/clang/Basic/DiagnosticSemaKinds.td
+++ b/clang/include/clang/Basic/DiagnosticSemaKinds.td
@@ -324,7 +324,7 @@ def warn_atomic_property_rule : Warning<
   "with a user defined setter/getter">;
 def err_use_continuation_class : Error<
   "illegal declaration of property in continuation class %0"
-  " - attribute must be readwrite, while its primary must be readonly">;
+  ": attribute must be readwrite, while its primary must be readonly">;
 def err_continuation_class : Error<"continuation class has no primary class">;
 def err_property_type : Error<"property cannot have array or function type %0">;
 def error_missing_property_context : Error<
diff --git a/clang/test/SemaObjC/continuation-class-err.m b/clang/test/SemaObjC/continuation-class-err.m
index 9c14d37cedc8..252518239f16 100644
--- a/clang/test/SemaObjC/continuation-class-err.m
+++ b/clang/test/SemaObjC/continuation-class-err.m
@@ -12,7 +12,7 @@
 
 @interface ReadOnly ()
 @property(readwrite, copy) id object;	// expected-warning {{property attribute in continuation class does not match the primary class}}
-@property(readonly) id object1; // expected-error {{illegal declaration of property in continuation class 'ReadOnly' - attribute must be}}
+@property(readonly) id object1; // expected-error {{illegal declaration of property in continuation class 'ReadOnly': attribute must be}}
 @property (readwrite, assign) int indentLevel; // OK. assign the the default in any case.
 @end
 
@@ -31,8 +31,8 @@
 @end
 
 @interface Bar ()
-@property (copy) id foo;	// expected-error {{illegal declaration of property in continuation class 'Bar' - attribute must be}}
-@property (copy) id fee;	// expected-error {{illegal declaration of property in continuation class 'Bar' - attribute must be}}
+@property (copy) id foo;	// expected-error {{illegal declaration of property in continuation class 'Bar': attribute must be}}
+@property (copy) id fee;	// expected-error {{illegal declaration of property in continuation class 'Bar': attribute must be}}
 @end
 
 @implementation Bar