Index: tests/OFFileManagerTests.m
==================================================================
--- tests/OFFileManagerTests.m
+++ tests/OFFileManagerTests.m
@@ -12,10 +12,12 @@
  * LICENSE.GPLv2 or LICENSE.GPLv3 respectively included in the packaging of this
  * file.
  */
 
 #include "config.h"
+
+#include <errno.h>
 
 #import "ObjFW.h"
 #import "ObjFWTest.h"
 
 @interface OFFileManagerTests: OTTestCase