diff --git a/Makefile.inc1 b/Makefile.inc1
index 8cf77116425e..fcb0b5595bb2 100644
--- a/Makefile.inc1
+++ b/Makefile.inc1
@@ -198,6 +198,18 @@ INCDIRS=	arpa g++/std objc protocols readline rpc rpcsvc openssl \
 # success, regardless of how old your existing system is.
 #
 buildworld:
+.if !defined(NOSECURE) && exists(${.CURDIR}/secure) && \
+	(!defined(USA_RESIDENT) || (${USA_RESIDENT} != NO && \
+	${USA_RESIDENT} != YES))
+	@echo
+	@echo "!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!"
+	@echo ">>> You must define the value of USA_RESIDENT as 'YES' or"
+	@echo ">>> 'NO' as appropriate, in the environment or /etc/make.conf"
+	@echo ">>> before building can proceed."
+	@echo "!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!"
+	@/usr/bin/false
+.endif
+
 	@echo
 	@echo "--------------------------------------------------------------"
 	@echo ">>> Rebuilding the temporary build tree"