diff --git a/distrib/evbarm/installimage/Makefile b/distrib/evbarm/installimage/Makefile
index d523a55c94af..128aeba8ec62 100644
--- a/distrib/evbarm/installimage/Makefile
+++ b/distrib/evbarm/installimage/Makefile
@@ -1,10 +1,14 @@
-#	$NetBSD: Makefile,v 1.4 2020/06/02 01:34:50 jmcneill Exp $
+#	$NetBSD: Makefile,v 1.5 2020/06/02 10:41:30 jmcneill Exp $
 
 .include <bsd.own.mk>
 
 INSTIMGBASE=	NetBSD-${DISTRIBVER}-${MACHINE_ARCH}-install	# gives ${IMGBASE}.img
 
+.if ${MKDEBUG:Uno} != "no"
+INSTIMAGEMB?=	2000			# for all installation binaries w/ debug
+.else
 INSTIMAGEMB?=	1550			# for all installation binaries
+.endif
 
 .if ${MACHINE_ARCH} == "aarch64"
 EFIBOOT=		${WORKDIR}/usr/mdec/bootaa64.efi