diff --git a/lib/Sema/SemaDeclObjC.cpp b/lib/Sema/SemaDeclObjC.cpp
index 667a12f..49fcfbf 100644
--- a/lib/Sema/SemaDeclObjC.cpp
+++ b/lib/Sema/SemaDeclObjC.cpp
@@ -417,10 +417,15 @@
           DeclarationNameInfo(SuperName, SuperLoc), LookupOrdinaryName, TUScope,
           NULL, NULL, false, CTC_NoKeywords);
       if ((PrevDecl = Corrected.getCorrectionDeclAs<ObjCInterfaceDecl>())) {
-        Diag(SuperLoc, diag::err_undef_superclass_suggest)
-          << SuperName << ClassName << PrevDecl->getDeclName();
-        Diag(PrevDecl->getLocation(), diag::note_previous_decl)
-          << PrevDecl->getDeclName();
+        if (PrevDecl == IDecl) {
+          // Don't correct to the class we're defining.
+          PrevDecl = 0;
+        } else {
+          Diag(SuperLoc, diag::err_undef_superclass_suggest)
+            << SuperName << ClassName << PrevDecl->getDeclName();
+          Diag(PrevDecl->getLocation(), diag::note_previous_decl)
+            << PrevDecl->getDeclName();
+        }
       }
     }
 
diff --git a/test/SemaObjC/class-def-test-1.m b/test/SemaObjC/class-def-test-1.m
index 95a259b..0d114b9 100644
--- a/test/SemaObjC/class-def-test-1.m
+++ b/test/SemaObjC/class-def-test-1.m
@@ -30,4 +30,6 @@
 @interface XCElementUnit : TD_NSObject {}
 @end
 
-
+// Make sure we don't typo-correct to ourselves.
+@interface SomeClassSub : SomeClassSup // expected-error{{cannot find interface declaration for 'SomeClassSup', superclass of 'SomeClassSub'}}
+@end