diff --git a/lisp/Config.FreeBSD_gencgc b/lisp/Config.FreeBSD_gencgc
index c92b7e2ec46bb79d2624368be7f37a8d32e1c0fc..50d2b0e089fcd88e502c4800f15aeb1de41f15f0 100644
--- a/lisp/Config.FreeBSD_gencgc
+++ b/lisp/Config.FreeBSD_gencgc
@@ -11,7 +11,7 @@ NM = nm -gp
 UNDEFSYMPATTERN=-Xlinker -u -Xlinker &
 ASSEM_SRC = x86-assem.S
 ARCH_SRC = x86-arch.c
-OS_SRC = FreeBSD-os.c os-common.c undefindeds.c
+OS_SRC = FreeBSD-os.c os-common.c undefineds.c
 OS_LINK_FLAGS=-static
 OS_LIBS=
 GC_SRC= gencgc.c