diff --git a/Source/Makefile.in b/Source/Makefile.in
index 21b3b1623..04b2691be 100644
--- a/Source/Makefile.in
+++ b/Source/Makefile.in
@@ -315,7 +315,8 @@ NSNUMBER_OFILES  = \
 GNUSTEP_CFILES = \
 NSZone.c \
 find_exec.c \
-objc-load.c
+objc-load.c \
+NSUser.c
 
 GNUSTEP_OTHER_SRCFILES = \
 NSConcreteNumber.m \