diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 30860c45647..5a0fde82ca7 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,7 @@
+2015-10-15  Jiong Wang  <jiong.wang@arm.com>
+
+	* config.gcc: Recognize "." in architecture base name for AArch64.
+
 2015-10-14  Uros Bizjak  <ubizjak@gmail.com>
 
 	* config/mips/mips.h (MIPS_STACK_ALIGN): Implement using
diff --git a/gcc/config.gcc b/gcc/config.gcc
index 1962b0fa923..33d2cb83bca 100644
--- a/gcc/config.gcc
+++ b/gcc/config.gcc
@@ -3545,7 +3545,7 @@ case "${target}" in
 
 			eval "val=\$with_$which"
 			base_val=`echo $val | sed -e 's/\+.*//'`
-			ext_val=`echo $val | sed -e 's/[a-z0-9\-]\+//'`
+			ext_val=`echo $val | sed -e 's/[a-z0-9.-]\+//'`
 
 			if [ $which = arch ]; then
 			  def=aarch64-arches.def