diff --git a/GCDWebServer/Core/GCDWebServerFunctions.m b/GCDWebServer/Core/GCDWebServerFunctions.m
index ec50086..2a1edfc 100644
--- a/GCDWebServer/Core/GCDWebServerFunctions.m
+++ b/GCDWebServer/Core/GCDWebServerFunctions.m
@@ -167,7 +167,7 @@ NSString* GCDWebServerDescribeData(NSData* data, NSString* type) {
 }
 
 NSString* GCDWebServerGetMimeTypeForExtension(NSString* extension, NSDictionary* overrides) {
-  NSDictionary* builtInOverrides = @{@"css": @"text/css"};
+  NSDictionary* builtInOverrides = @{ @"css" : @"text/css" };
   NSString* mimeType = nil;
   extension = [extension lowercaseString];
   if (extension.length) {