diff --git a/CGDWebServer/GCDWebServer.h b/CGDWebServer/GCDWebServer.h
index fe85029..80dc14c 100644
--- a/CGDWebServer/GCDWebServer.h
+++ b/CGDWebServer/GCDWebServer.h
@@ -25,6 +25,8 @@
  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
+#import <TargetConditionals.h>
+
 #import "GCDWebServerRequest.h"
 #import "GCDWebServerResponse.h"
 
diff --git a/CGDWebServer/GCDWebServer.m b/CGDWebServer/GCDWebServer.m
index dd23c1f..650d30b 100644
--- a/CGDWebServer/GCDWebServer.m
+++ b/CGDWebServer/GCDWebServer.m
@@ -86,9 +86,9 @@ void GCDLogMessage(long level, NSString* format, ...) {
 NSString* GCDWebServerGetMimeTypeForExtension(NSString* extension) {
   static NSDictionary* _overrides = nil;
   if (_overrides == nil) {
-    _overrides = [[NSDictionary alloc] initWithObjectsAndKeys:
-                  @"text/css", @"css",
-                  nil];
+    _overrides = @{
+                   @"css": @"text/css"
+                   };
   }
   NSString* mimeType = nil;
   extension = [extension lowercaseString];