Index: sys/modules/linux64/Makefile
===================================================================
--- sys/modules/linux64/Makefile
+++ sys/modules/linux64/Makefile
@@ -74,9 +74,9 @@
 	    linux_vdso.so.o ${.TARGET}
 	${STRIPBIN} -N _binary_linux_vdso_so_o_size ${.TARGET}
 
-linux_support.o: assym.inc linux_assym.h
+linux_support.o: linux_support.s assym.inc linux_assym.h
 	${CC} -c -x assembler-with-cpp -DLOCORE ${CFLAGS} \
-	    ${.IMPSRC} -o ${.TARGET}
+	    linux_support.s -o ${.TARGET}
 
 linux_genassym.o: offset.inc
 	${CC} -c ${CFLAGS:N-flto:N-fno-common} -fcommon ${.IMPSRC}