diff --git a/Source/Makefile.in b/Source/Makefile.in
index 07d5b2b85..21b3b1623 100644
--- a/Source/Makefile.in
+++ b/Source/Makefile.in
@@ -298,6 +298,7 @@ NSObject.m \
 NSRange.m \
 NSString.m \
 NSUnarchiver.m \
+NSUser.m \
 NSValue.m
 
 NSVALUE_CLUSTER = 0 1 2 3 4
@@ -360,6 +361,7 @@ Foundation/NSRange.h \
 Foundation/NSSerialization.h \
 Foundation/NSString.h \
 Foundation/NSUnarchiver.h \
+Foundation/NSUser.h \
 Foundation/NSUtilities.h \
 Foundation/NSValue.h \
 Foundation/NSZone.h \