diff --git a/configure b/configure
index 8ace6929..ac2e832d 100755
--- a/configure
+++ b/configure
@@ -1287,7 +1287,7 @@ Optional Packages:
   --with-PACKAGE[=ARG]    use PACKAGE [ARG=yes]
   --without-PACKAGE       do not use PACKAGE (same as --with-PACKAGE=no)
   --with-xlen=XLEN        Set XLEN, the X-register bit width (default is 64)
-  --with-arch=G           Sets the base RISC-V ISA, defaults to G
+  --with-arch=IMAFD       Sets the base RISC-V ISA, defaults to IMAFD
 
 Some influential environment variables:
   CC          C compiler command
@@ -3156,7 +3156,7 @@ if test "${with_arch+set}" = set; then :
   withval=$with_arch; ARCH=$withval
 
 else
-  ARCH=G
+  ARCH=IMAFD
 
 
 fi