diff --git a/Makefile.in b/Makefile.in
index 8c17203ba..f3b1351bc 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -235,6 +235,7 @@ objects/Magnitude.h \
 objects/MallocAddress.h \
 objects/MappedCollector.h \
 objects/MemoryStream.h \
+objects/NSString.h \
 objects/Ordering.h \
 objects/Port.h \
 objects/Proxy.h \