diff --git a/OHHTTPStubs/Sources/OHHTTPStubsResponse.m b/OHHTTPStubs/Sources/OHHTTPStubsResponse.m
index 03e4dba5..256878d9 100644
--- a/OHHTTPStubs/Sources/OHHTTPStubsResponse.m
+++ b/OHHTTPStubs/Sources/OHHTTPStubsResponse.m
@@ -167,7 +167,7 @@ -(instancetype)initWithFileURL:(NSURL *)fileURL
     
     NSNumber *fileSize;
     NSError *error;
-    const BOOL success = [fileURL getResourceValue:&fileSize forKey:NSURLFileSizeKey error:&error];
+    const BOOL success __unused = [fileURL getResourceValue:&fileSize forKey:NSURLFileSizeKey error:&error];
     
     NSAssert(success && fileSize, @"%s Couldn't get the file size for URL. \
 The URL was: %@. \
diff --git a/OHHTTPStubs/Sources/Swift/OHHTTPStubsSwift.swift b/OHHTTPStubs/Sources/Swift/OHHTTPStubsSwift.swift
index 5229dcb8..02b065a7 100644
--- a/OHHTTPStubs/Sources/Swift/OHHTTPStubsSwift.swift
+++ b/OHHTTPStubs/Sources/Swift/OHHTTPStubsSwift.swift
@@ -124,6 +124,7 @@ public func isExtension(ext: String) -> OHHTTPStubsTestBlock {
  *          (1) using `[q:""]`, which matches a query parameter "?q=" with an empty value, and
  *          (2) using `[q:nil]`, which matches a query parameter "?q" without a value at all
  */
+@available(iOS 8.0, OSX 10.10, *)
 public func containsQueryParams(params: [String:String?]) -> OHHTTPStubsTestBlock {
     return { req in
         if let url = req.URL {