diff --git a/gcc/config.sub b/gcc/config.sub
index 32af59eae3a..4e79c595757 100755
--- a/gcc/config.sub
+++ b/gcc/config.sub
@@ -77,7 +77,7 @@ esac
 case $basic_machine in
 	# Recognize the basic CPU types with without company name.
 	# Some are omitted here because they have special meanings below.
-	tahoe | i386 | i860 | m68k | m68000 | m88k | ns32k | arm | pyramid \
+	tahoe | i[34]86 | i860 | m68k | m68000 | m88k | ns32k | arm | pyramid \
 		| tron | a29k | 580 | i960 | h8300 | hppa)
 		basic_machine=$basic_machine-unknown
 		;;