diff --git a/Core/Source/DTUTI/NSString+DTUTI.m b/Core/Source/DTUTI/NSString+DTUTI.m
index 8d4637b7..7a4695f4 100644
--- a/Core/Source/DTUTI/NSString+DTUTI.m
+++ b/Core/Source/DTUTI/NSString+DTUTI.m
@@ -18,7 +18,7 @@ + (NSString *)MIMETypeForFileExtension:(NSString *)extension
 {
 	CFStringRef typeForExt = UTTypeCreatePreferredIdentifierForTag(kUTTagClassFilenameExtension,(__bridge CFStringRef)extension , NULL);
 	NSString *result = (__bridge_transfer NSString *)UTTypeCopyPreferredTagWithClass(typeForExt, kUTTagClassMIMEType);
-	
+	CFRelease(typeForExt);
 	if (!result)
 	{
 		return @"application/octet-stream";
@@ -30,8 +30,9 @@ + (NSString *)MIMETypeForFileExtension:(NSString *)extension
 + (NSString *)fileTypeDescriptionForFileExtension:(NSString *)extension
 {
 	CFStringRef typeForExt = UTTypeCreatePreferredIdentifierForTag(kUTTagClassFilenameExtension,(__bridge CFStringRef)extension , NULL);
-	
-	return (__bridge_transfer NSString *)UTTypeCopyDescription(typeForExt);
+	NSString *result = (__bridge_transfer NSString *)UTTypeCopyDescription(typeForExt);
+	CFRelease(typeForExt);
+	return result;
 }
 
 + (NSString *)universalTypeIdentifierForFileExtension:(NSString *)extension