diff --git a/lisp/Config.sun4c_41 b/lisp/Config.sun4c_41
index 60e5f09890285c7a308451b9f5f41b8af4cda927..a7fb8168bd9d541b5be00850ec16afc9fc1492ff 100644
--- a/lisp/Config.sun4c_41
+++ b/lisp/Config.sun4c_41
@@ -6,6 +6,6 @@ ASFLAGS = -g
 NM = nm -gp
 ASSEM_SRC = sparc-assem.S
 ARCH_SRC = sparc-arch.c
-OS_SRC = sunos-os.c
+OS_SRC = sunos-os.c os-common.c
 OS_LINK_FLAGS=-Bstatic
 OS_LIBS=