Index: lib/Sema/SemaExprObjC.cpp
===================================================================
--- lib/Sema/SemaExprObjC.cpp
+++ lib/Sema/SemaExprObjC.cpp
@@ -1984,13 +1984,26 @@
     }
   }
 
+  Selector GetterSel;
+  Selector SetterSel;
+  if (auto PD = IFace->FindPropertyDeclaration(
+          &propertyName, ObjCPropertyQueryKind::OBJC_PR_query_class)) {
+    GetterSel = PD->getGetterName();
+    SetterSel = PD->getSetterName();
+  } else {
+    GetterSel = PP.getSelectorTable().getNullarySelector(&propertyName);
+    SetterSel =
+      SelectorTable::constructSetterSelector(PP.getIdentifierTable(),
+                                             PP.getSelectorTable(),
+                                             &propertyName);
+  }
+
   // Search for a declared property first.
-  Selector Sel = PP.getSelectorTable().getNullarySelector(&propertyName);
-  ObjCMethodDecl *Getter = IFace->lookupClassMethod(Sel);
+  ObjCMethodDecl *Getter = IFace->lookupClassMethod(GetterSel);
 
   // If this reference is in an @implementation, check for 'private' methods.
   if (!Getter)
-    Getter = IFace->lookupPrivateClassMethod(Sel);
+    Getter = IFace->lookupPrivateClassMethod(GetterSel);
 
   if (Getter) {
     // FIXME: refactor/share with ActOnMemberReference().
@@ -2000,11 +2013,6 @@
   }
 
   // Look for the matching setter, in case it is needed.
-  Selector SetterSel =
-    SelectorTable::constructSetterSelector(PP.getIdentifierTable(),
-                                            PP.getSelectorTable(),
-                                           &propertyName);
-
   ObjCMethodDecl *Setter = IFace->lookupClassMethod(SetterSel);
   if (!Setter) {
     // If this reference is in an @implementation, also check for 'private'
Index: test/SemaObjC/objc-class-property.m
===================================================================
--- test/SemaObjC/objc-class-property.m
+++ test/SemaObjC/objc-class-property.m
@@ -21,6 +21,8 @@
 @property (class) int c2; // expected-note {{property declared here}} \
                           // expected-note {{property declared here}}
 @property (class) int x;
+@property (class, setter=customSet:) int customSetterProperty;
+@property (class, getter=customGet) int customGetterProperty;
 @end
 
 @implementation A // expected-warning {{class property 'c2' requires method 'c2' to be defined}} \
@@ -29,6 +31,8 @@
 @dynamic (class) x; // refers to the class property
 @synthesize z, c2; // expected-error {{@synthesize not allowed on a class property 'c2'}}
 @dynamic c; // refers to the class property
+@dynamic customSetterProperty;
+@dynamic customGetterProperty;
 @end
 
 int test() {
@@ -37,6 +41,11 @@
   return a.x + A.c;
 }
 
+void customSelectors() {
+  A.customSetterProperty = 1;
+  (void)A.customGetterProperty;
+}
+
 void message_id(id me) {
   [me y];
 }