@@ -19,10 +19,12 @@
 #import "OFHashAlreadyCalculatedException.h"
 #import "OFString.h"
 #import "OFHash.h"
 
 #import "OFNotImplementedException.h"
+
+#import "common.h"
 
 @implementation OFHashAlreadyCalculatedException
 + exceptionWithClass: (Class)class_
 		hash: (OFHash*)hash
 {