diff --git a/share/mk/bsd.compat.mk b/share/mk/bsd.compat.mk
--- a/share/mk/bsd.compat.mk
+++ b/share/mk/bsd.compat.mk
@@ -151,6 +151,7 @@
 .endfor
 
 .if defined(USE_COMPAT)
+_LIBCOMPAT=	${USE_COMPAT}
 libcompat=	${USE_COMPAT:tl}
 
 _LIBCOMPAT_MAKEVARS=	_OBJTOP TMP CPUFLAGS CFLAGS CXXFLAGS LDFLAGS \