diff --git a/sys/compat/common/Makefile.inc b/sys/compat/common/Makefile.inc
index a8020442f744..ed082446f790 100644
--- a/sys/compat/common/Makefile.inc
+++ b/sys/compat/common/Makefile.inc
@@ -1,4 +1,4 @@
-#	$NetBSD: Makefile.inc,v 1.7 1996/08/08 15:15:16 mycroft Exp $
+#	$NetBSD: Makefile.inc,v 1.8 1996/08/10 03:00:51 mycroft Exp $
 #
 #	NOTE: $S must correspond to the top of the 'sys' tree
 
@@ -12,7 +12,7 @@ COMPATMAKE= \
 	cd ${COMPATDIR} && MAKEOBJDIR=${COMPATDST} ${MAKE} \
 	    CC='${CC}' CFLAGS='${CFLAGS}' \
 	    LD='${LD}' \
-	    COMPATCPPFLAGS='${CPPFLAGS}'
+	    COMPATCPPFLAGS='${CPPFLAGS:S@-I.@-I${.OBJDIR}@}'
 
 ${COMPATLIB}:		.NOTMAIN __always_make_compatlib
 	@echo making sure the compat library is up to date...
diff --git a/sys/lib/libkern/Makefile b/sys/lib/libkern/Makefile
index 6d41d5d1c754..8ac32c78eeeb 100644
--- a/sys/lib/libkern/Makefile
+++ b/sys/lib/libkern/Makefile
@@ -1,11 +1,11 @@
-#	$NetBSD: Makefile,v 1.29 1996/08/08 15:15:18 mycroft Exp $
+#	$NetBSD: Makefile,v 1.30 1996/08/10 03:00:57 mycroft Exp $
 
 LIB=	kern
 NOPIC=
 
 M=	${.CURDIR}/arch/${MACHINE_ARCH}
 
-CPPFLAGS=	-I$M ${KERNCPPFLAGS}
+CPPFLAGS=	-I$M -I. ${KERNCPPFLAGS}
 
 .if exists ($M/Makefile.inc)
 .PATH:	$M
diff --git a/sys/lib/libkern/Makefile.inc b/sys/lib/libkern/Makefile.inc
index b5deb5c2aca4..b8de040aa7e7 100644
--- a/sys/lib/libkern/Makefile.inc
+++ b/sys/lib/libkern/Makefile.inc
@@ -1,4 +1,4 @@
-#	$NetBSD: Makefile.inc,v 1.17 1996/08/08 15:15:19 mycroft Exp $
+#	$NetBSD: Makefile.inc,v 1.18 1996/08/10 03:00:59 mycroft Exp $
 #
 #	NOTE: $S must correspond to the top of the 'sys' tree
 
@@ -14,7 +14,7 @@ KERNMAKE= \
 	    AS='${AS}' AFLAGS='${AFLAGS}' \
 	    LD='${LD}' \
 	    MACHINE='${MACHINE}' MACHINE_ARCH='${MACHINE_ARCH}' \
-	    KERNCPPFLAGS='${CPPFLAGS}'
+	    KERNCPPFLAGS='${CPPFLAGS:S@-I.@-I${.OBJDIR}@}'
 
 ${KERNLIB}:		.NOTMAIN __always_make_kernlib
 	@echo making sure the kern library is up to date...