diff --git a/Configure b/Configure
index 184a1db8b0..5ac603273b 100755
--- a/Configure
+++ b/Configure
@@ -182,7 +182,9 @@ my %table=(
 "FreeBSD-elf",  "gcc:-DTERMIOS -DL_ENDIAN -fomit-frame-pointer -O3 -m486 -Wall:(unknown)::BN_LLONG $x86_gcc_des $x86_gcc_opts:$x86_elf_asm",
 "bsdi-gcc",     "gcc:-O3 -ffast-math -DL_ENDIAN -DPERL5 -m486:(unknown)::RSA_LLONG $x86_gcc_des $x86_gcc_opts:$x86_bsdi_asm",
 "bsdi-elf-gcc",     "gcc:-DPERL5 -DL_ENDIAN -fomit-frame-pointer -O3 -m486 -Wall:(unknown)::BN_LLONG $x86_gcc_des $x86_gcc_opts:$x86_elf_asm",
-"nextstep",	"cc:-O3 -Wall:(unknown)::BN_LLONG $x86_gcc_des ${x86_gcc_opts}:::",
+# Mark Crispin advises against using -O3 on NeXTstep ...
+# "nextstep",	"cc:-O3 -Wall:(unknown)::BN_LLONG $x86_gcc_des ${x86_gcc_opts}:::",
+"nextstep",	"cc:-O -Wall:(unknown)::BN_LLONG $x86_gcc_des ${x86_gcc_opts}:::",
 # NCR MP-RAS UNIX ver 02.03.01
 "ncr-scde","cc:-O6 -Xa -Hoff=BEHAVED -686 -Hwide -Hiw:(unknown):-lsocket -lnsl:$x86_gcc_des ${x86_gcc_opts}:::",