diff --git a/Source/Connection.m b/Source/Connection.m
index 07b7d4ff3..526651d7b 100644
--- a/Source/Connection.m
+++ b/Source/Connection.m
@@ -33,6 +33,7 @@
 #include <objects/Dictionary.h>
 #include <objects/Queue.h>
 #include <objects/mframe.h>
+#include <objects/String.h>
 #include <assert.h>
 
 @interface Connection (GettingCoderInterface)