1 files changed, 1 insertions, 1 deletions
diff --git a/clang/lib/Sema/SemaObjCProperty.cpp b/clang/lib/Sema/SemaObjCProperty.cpp
index e1e85dfd5e5..d0b59eb7895 100644
--- a/clang/lib/Sema/SemaObjCProperty.cpp
+++ b/clang/lib/Sema/SemaObjCProperty.cpp
@@ -1895,7 +1895,7 @@ void Sema::DefaultSynthesizeProperties(Scope *S, ObjCImplDecl *IMPDecl,
                             /* property = */ Prop->getIdentifier(),
                             /* ivar = */ Prop->getDefaultSynthIvarName(Context),
                             Prop->getLocation(), Prop->getQueryKind()));
-    if (PIDecl) {
+    if (PIDecl && !Prop->isUnavailable()) {
       Diag(Prop->getLocation(), diag::warn_missing_explicit_synthesis);
       Diag(IMPDecl->getLocation(), diag::note_while_in_implementation);
     }