diff --git a/Makefile.inc1 b/Makefile.inc1
index ffa3f0051976..c8207944d8b2 100644
--- a/Makefile.inc1
+++ b/Makefile.inc1
@@ -1935,7 +1935,7 @@ lib/liblzma__L: lib/libthr__L
 
 _generic_libs=	${_cddl_lib} gnu/lib ${_kerberos5_lib} lib ${_secure_lib} usr.bin/lex/lib ${_ofed_lib}
 .for _DIR in ${LOCAL_LIB_DIRS}
-.if exists(${.CURDIR}/${_DIR}/Makefile)
+.if exists(${.CURDIR}/${_DIR}/Makefile) && empty(_generic_libs:M${_DIR})
 _generic_libs+= ${_DIR}
 .endif
 .endfor