Index: src/exceptions/OFException.h
==================================================================
--- src/exceptions/OFException.h
+++ src/exceptions/OFException.h
@@ -132,10 +132,14 @@
 # endif
 # ifndef EWOULDBLOCK
 #  define EWOULDBLOCK WSAEWOULDBLOCK
 # endif
 #endif
+
+#ifndef EWOULDBLOCK
+# define EWOULDBLOCK EAGAIN
+#endif
 
 /**
  * @class OFException OFException.h ObjFW/OFException.h
  *
  * @brief The base class for all exceptions in ObjFW