diff --git a/clang/lib/Analysis/CalledOnceCheck.cpp b/clang/lib/Analysis/CalledOnceCheck.cpp
--- a/clang/lib/Analysis/CalledOnceCheck.cpp
+++ b/clang/lib/Analysis/CalledOnceCheck.cpp
@@ -57,6 +57,7 @@
     "WithReplyTo", "WithReply"};
 constexpr llvm::StringLiteral CONVENTIONAL_CONDITIONS[] = {
     "error", "cancel", "shouldCall", "done", "OK", "success"};
+constexpr llvm::StringLiteral INIT_PREFIX = "init";
 
 struct KnownCalledOnceParameter {
   llvm::StringLiteral FunctionName;
@@ -1011,11 +1012,16 @@
     return llvm::None;
   }
 
+  /// Return true if the specified selector represents init method.
+  static bool isInitMethod(Selector MethodSelector) {
+    return MethodSelector.getNameForSlot(0).startswith_lower(INIT_PREFIX);
+  }
+
   /// Return true if the specified selector piece matches conventions.
   static bool isConventionalSelectorPiece(Selector MethodSelector,
                                           unsigned PieceIndex,
                                           QualType PieceType) {
-    if (!isConventional(PieceType)) {
+    if (!isConventional(PieceType) || isInitMethod(MethodSelector)) {
       return false;
     }
 
diff --git a/clang/test/SemaObjC/warn-called-once.m b/clang/test/SemaObjC/warn-called-once.m
--- a/clang/test/SemaObjC/warn-called-once.m
+++ b/clang/test/SemaObjC/warn-called-once.m
@@ -13,6 +13,7 @@
 @protocol NSObject
 @end
 @interface NSObject <NSObject>
+- (instancetype)init;
 - (id)copy;
 - (id)class;
 - autorelease;
@@ -1235,4 +1236,13 @@
   handler(); // expected-warning{{completion handler is called twice}}
 }
 
+- (void)initWithAdditions:(int)cond
+           withCompletion:(void (^)(void))handler {
+  self = [self init];
+  if (self) {
+    escape(handler);
+  }
+  // no-warning
+}
+
 @end