diff --git a/share/mk/bsd.obj.mk b/share/mk/bsd.obj.mk
index 235d6eb12953..c9377db63c55 100644
--- a/share/mk/bsd.obj.mk
+++ b/share/mk/bsd.obj.mk
@@ -51,6 +51,30 @@ CANONICALOBJDIR= ${.OBJDIR}
 # but this makefile does not want it!
 .OBJDIR: ${.CURDIR}
 .endif
+# Handle special case where SRCS is full-pathed and requires
+# nested objdirs.  This duplicates some auto.obj.mk logic.
+.if (!empty(SRCS:M*/*) || !empty(DPSRCS:M*/*)) && \
+    (${.TARGETS} == "" || ${.TARGETS:Nclean*:N*clean:Ndestroy*} != "")
+_wantdirs=	${SRCS:M*/*:H} ${DPSRCS:M*/*:H}
+.if !empty(_wantdirs)
+_wantdirs:=	${_wantdirs:O:u}
+_needdirs=
+.for _dir in ${_wantdirs}
+.if !exists(${.OBJDIR}/${_dir}/)
+_needdirs+=	${_dir}
+.endif
+.endfor
+.endif
+.if !empty(_needdirs)
+#_mkneededdirs!=	umask ${OBJDIR_UMASK:U002}; ${Mkdirs} ${_needdirs}
+__objdir_made != umask ${OBJDIR_UMASK:U002}; ${Mkdirs}; \
+	for dir in ${_needdirs}; do \
+	  dir=${.OBJDIR}/$${dir}; \
+	  ${ECHO_TRACE} "[Creating nested objdir $${dir}...]" >&2; \
+          Mkdirs $${dir}; \
+	done
+.endif
+.endif	# !empty(SRCS:M*/*) || !empty(DPSRCS:M*/*)
 .elif defined(MAKEOBJDIRPREFIX)
 CANONICALOBJDIR:=${MAKEOBJDIRPREFIX}${.CURDIR}
 .elif defined(MAKEOBJDIR) && ${MAKEOBJDIR:M/*} != ""