diff --git a/usr.bin/gprof/Makefile b/usr.bin/gprof/Makefile
index 506232597a42..28d0ffeef25c 100644
--- a/usr.bin/gprof/Makefile
+++ b/usr.bin/gprof/Makefile
@@ -2,8 +2,14 @@
 #	$FreeBSD$
 
 PROG=	gprof
-SRCS=	gprof.c aout.c arcs.c dfn.c elf.c lookup.c hertz.c \
+SRCS=	gprof.c arcs.c dfn.c elf.c lookup.c hertz.c \
 	printgprof.c printlist.c kernel.c
+
+.if ${MACHINE_ARCH} != "aarch64" && ${MACHINE_ARCH} != "riscv" && \
+    ${MACHINE_ARCH} != "s390x"
+SRCS+=	aout.c
+CFLAGS+=	-DWITH_AOUT
+.endif
 FILES=	gprof.flat gprof.callg
 FILESDIR=	${SHAREDIR}/misc
 
diff --git a/usr.bin/gprof/gprof.c b/usr.bin/gprof/gprof.c
index 1821fa0bb33f..4970792f0502 100644
--- a/usr.bin/gprof/gprof.c
+++ b/usr.bin/gprof/gprof.c
@@ -160,8 +160,11 @@ main(int argc, char **argv)
 	 *	get information from the executable file.
 	 */
     if ((Kflag && kernel_getnfile(a_outname, &defaultEs) == -1) ||
-      (!Kflag && elf_getnfile(a_outname, &defaultEs) == -1 &&
-      aout_getnfile(a_outname, &defaultEs) == -1))
+      (!Kflag && elf_getnfile(a_outname, &defaultEs) == -1
+#ifdef WITH_AOUT
+      && aout_getnfile(a_outname, &defaultEs) == -1
+#endif
+      ))
 	errx(1, "%s: bad format", a_outname);
 	/*
 	 *	sort symbol table.
diff --git a/usr.bin/gprof/gprof.h b/usr.bin/gprof/gprof.h
index 4e801cce21e3..6c54fbd4047e 100644
--- a/usr.bin/gprof/gprof.h
+++ b/usr.bin/gprof/gprof.h
@@ -256,7 +256,9 @@ void		addarc(nltype *, nltype *, long);
 bool		addcycle(arctype **, arctype **);
 void		addlist(struct stringlist *, char *);
 void		alignentries(void);
+#ifdef WITH_AOUT
 int		aout_getnfile(const char *, char ***);
+#endif
 int		arccmp(arctype *, arctype *);
 arctype		*arclookup(nltype *, nltype *);
 void		asgnsamples(void);