diff --git a/OpenChange/BSONCodec.m b/OpenChange/BSONCodec.m
index 9e601fe3a..518900ba2 100644
--- a/OpenChange/BSONCodec.m
+++ b/OpenChange/BSONCodec.m
@@ -9,7 +9,7 @@
 #import "BSONCodec.h"
 #import <ctype.h>
 #import <string.h>
-#import <objc/runtime.h>
+#import <objc/objc.h>
 
 #define BSONTYPE(tag,className) [className class], [NSNumber numberWithChar: (tag)]