diff --git a/AFNetworking/AFHTTPClient.m b/AFNetworking/AFHTTPClient.m
index b375c51..ab7c74d 100644
--- a/AFNetworking/AFHTTPClient.m
+++ b/AFNetworking/AFHTTPClient.m
@@ -688,7 +688,7 @@ static inline NSString * AFMultipartFormEncapsulationBoundary() {
 }
 
 static inline NSString * AFMultipartFormFinalBoundary() {
-    return [NSString stringWithFormat:@"%@--%@--%@%@", kAFMultipartFormCRLF, kAFMultipartFormBoundary, kAFMultipartFormCRLF, kAFMultipartFormCRLF];
+    return [NSString stringWithFormat:@"%@--%@--%@", kAFMultipartFormCRLF, kAFMultipartFormBoundary, kAFMultipartFormCRLF];
 }
 
 @interface AFMultipartFormData ()