diff --git a/Makefile.inc1 b/Makefile.inc1
index 542121976333..2767a6038354 100644
--- a/Makefile.inc1
+++ b/Makefile.inc1
@@ -3390,7 +3390,7 @@ check-old: check-old-files check-old-libs check-old-dirs .PHONY
 # showconfig - show build configuration.
 #
 showconfig: .PHONY
-	@(${MAKE} -n -f ${.CURDIR}/sys/conf/kern.opts.mk -V dummy -dg1 UPDATE_DEPENDFILE=no NO_OBJ=yes; \
+	@(${MAKE} -n -f ${.CURDIR}/sys/conf/kern.opts.mk -V dummy -dg1 UPDATE_DEPENDFILE=no NO_OBJ=yes MACHINE=${TARGET} MACHINE_ARCH=${TARGET_ARCH}; \
 	  ${MAKE} -n -f ${.CURDIR}/share/mk/src.opts.mk -V dummy -dg1 UPDATE_DEPENDFILE=no NO_OBJ=yes) 2>&1 | grep ^MK_ | sort -u
 
 .if !empty(KRNLOBJDIR) && !empty(KERNCONF)