diff --git a/AFNetworking/AFHTTPSessionManager.m b/AFNetworking/AFHTTPSessionManager.m
index e2cea27..851e3f2 100644
--- a/AFNetworking/AFHTTPSessionManager.m
+++ b/AFNetworking/AFHTTPSessionManager.m
@@ -52,10 +52,18 @@
     return [[AFHTTPSessionManager alloc] initWithBaseURL:nil];
 }
 
+- (instancetype)init {
+    return [self initWithBaseURL:nil];
+}
+
 - (instancetype)initWithBaseURL:(NSURL *)url {
     return [self initWithBaseURL:url sessionConfiguration:nil];
 }
 
+- (instancetype)initWithSessionConfiguration:(NSURLSessionConfiguration *)configuration {
+    return [self initWithBaseURL:nil sessionConfiguration:configuration];
+}
+
 - (instancetype)initWithBaseURL:(NSURL *)url
            sessionConfiguration:(NSURLSessionConfiguration *)configuration
 {