@@ -16,15 +16,22 @@
  */
 
 #include "config.h"
 
 #import "OFSHA224Hash.h"
+
+#define DIGEST_SIZE 28
 
 @implementation OFSHA224Hash
 + (size_t)digestSize
 {
-	return 28;
+	return DIGEST_SIZE;
+}
+
+- (size_t)digestSize
+{
+	return DIGEST_SIZE;
 }
 
 - (void)of_resetState
 {
 	_iVars->state[0] = 0xC1059ED8;