Index: stand/userboot/test/Makefile
===================================================================
--- stand/userboot/test/Makefile
+++ stand/userboot/test/Makefile
@@ -4,6 +4,10 @@
 
 PROG=		test
 INTERNALPROG=
+.if ${MK_ASAN} != "no" || ${MK_UBSAN} != "no"
+# Avoid linking against a possibly sanitizer-instrumented libgcc_s.so
+NO_SHARED=yes
+.endif
 
 CFLAGS=	-I${BOOTSRC}/userboot