diff --git a/sys/conf/Makefile.powerpc b/sys/conf/Makefile.powerpc
index a9ff1262c60..bd6f1fa009a 100644
--- a/sys/conf/Makefile.powerpc
+++ b/sys/conf/Makefile.powerpc
@@ -60,7 +60,7 @@ INCLUDES+= -I$S/../include
 INCLUDES+= -I/usr/include
 .endif
 
-COPTS=	${INCLUDES} ${IDENT} -D_KERNEL -include opt_global.h
+COPTS=	${INCLUDES} ${IDENT} -D_KERNEL -D__ELF__ -D__FreeBSD__ -include opt_global.h -msoft-float
 CFLAGS=	${COPTFLAGS} ${CWARNFLAGS} ${DEBUG} ${COPTS}
 
 # XXX LOCORE means "don't declare C stuff" not "for locore.s".
diff --git a/sys/conf/files.powerpc b/sys/conf/files.powerpc
index 842214728ce..225fb95d21f 100644
--- a/sys/conf/files.powerpc
+++ b/sys/conf/files.powerpc
@@ -17,6 +17,7 @@ powerpc/powerpc/clock.c		standard
 powerpc/powerpc/copyinstr.c	standard
 powerpc/powerpc/copystr.c	standard
 powerpc/powerpc/elf_machdep.c	standard
+powerpc/powerpc/extintr.c	standard
 powerpc/powerpc/fubyte.c	standard
 powerpc/powerpc/fuswintr.c	standard
 powerpc/powerpc/fuword.c	standard
@@ -34,6 +35,11 @@ powerpc/powerpc/swtch.s		standard
 powerpc/powerpc/trap.c		standard
 powerpc/powerpc/vm_machdep.c	standard
 
+powerpc/powerpc/db_disasm.c	optional	ddb
+powerpc/powerpc/db_interface.c	optional	ddb
+powerpc/powerpc/db_memrw.c	optional	ddb
+powerpc/powerpc/db_trace.c	optional	ddb
+
 dev/ofw/openfirm.c		standard
 dev/ofw/ofw_console.c		standard