@@ -24,10 +24,11 @@
 
 #ifdef OF_HAVE_SYS_TYPES_H
 # include <sys/types.h>
 #endif
 
+#import "OFASN1DERRepresentation.h"
 #import "OFJSONRepresentation.h"
 #import "OFMessagePackRepresentation.h"
 #import "OFValue.h"
 
 OF_ASSUME_NONNULL_BEGIN
@@ -37,12 +38,12 @@
 /**
  * @class OFNumber OFNumber.h ObjFW/OFNumber.h
  *
  * @brief Provides a way to store a number in an object.
  */
-@interface OFNumber: OFValue <OFComparing, OFJSONRepresentation,
-    OFMessagePackRepresentation>
+@interface OFNumber: OFValue <OFComparing, OFASN1DERRepresentation,
+    OFJSONRepresentation, OFMessagePackRepresentation>
 /**
  * @brief The OFNumber as a `bool`.
  */
 @property (readonly, nonatomic) bool boolValue;