Index: src/OFFileManager.h
==================================================================
--- src/OFFileManager.h
+++ src/OFFileManager.h
@@ -227,10 +227,19 @@
 
 /**
  * @brief A socket.
  */
 extern const OFFileAttributeType OFFileTypeSocket;
+
+/**
+ * @brief An unknown file type.
+ *
+ * This is different from not having an @ref OFFileType at all in that it means
+ * that retrieving file types is supported, but the particular file type is
+ * unknown.
+ */
+extern const OFFileAttributeType OFFileTypeUnknown;
 #ifdef __cplusplus
 }
 #endif
 
 /**

Index: src/OFFileManager.m
==================================================================
--- src/OFFileManager.m
+++ src/OFFileManager.m
@@ -93,10 +93,11 @@
 const OFFileAttributeType OFFileTypeFIFO = @"OFFileTypeFIFO";
 const OFFileAttributeType OFFileTypeCharacterSpecial =
     @"OFFileTypeCharacterSpecial";
 const OFFileAttributeType OFFileTypeBlockSpecial = @"OFFileTypeBlockSpecial";
 const OFFileAttributeType OFFileTypeSocket = @"OFFileTypeSocket";
+const OFFileAttributeType OFFileTypeUnknown = @"OFFileTypeUnknown";
 
 #ifdef OF_AMIGAOS4
 # define CurrentDir(lock) SetCurrentDir(lock)
 #endif
 

Index: src/OFFileURLHandler.m
==================================================================
--- src/OFFileURLHandler.m
+++ src/OFFileURLHandler.m
@@ -386,10 +386,12 @@
 #endif
 #ifdef S_ISSOCK
 	else if (S_ISSOCK(s->st_mode))
 		[attributes setObject: OFFileTypeSocket forKey: OFFileType];
 #endif
+	else
+		[attributes setObject: OFFileTypeUnknown forKey: OFFileType];
 }
 
 static void
 setDateAttributes(OFMutableFileAttributes attributes, Stat *s)
 {