diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index dce8a58de8c..a3646d4bd03 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,11 @@
+2013-10-17  Michael Hudson-Doyle  <michael.hudson@linaro.org>
+
+	* gcc/testsuite/lib/target-supports.exp
+	(check_effective_target_sync_long_long): AArch64 supports
+	atomic operations on "long long".
+	(check_effective_target_sync_long_long_runtime): AArch64 can
+	execute atomic operations on "long long".
+
 2013-10-17  Richard Biener  <rguenther@suse.de>
 
 	PR tree-optimization/58143
diff --git a/gcc/testsuite/lib/target-supports.exp b/gcc/testsuite/lib/target-supports.exp
index 7eb4dfeec0e..5557c066a7f 100644
--- a/gcc/testsuite/lib/target-supports.exp
+++ b/gcc/testsuite/lib/target-supports.exp
@@ -4508,6 +4508,7 @@ proc check_effective_target_sync_int_128_runtime { } {
 proc check_effective_target_sync_long_long { } {
     if { [istarget x86_64-*-*]
 	 || [istarget i?86-*-*])
+	 || [istarget aarch64*-*-*]
 	 || [istarget arm*-*-*]
 	 || [istarget alpha*-*-*]
 	 || ([istarget sparc*-*-*] && [check_effective_target_lp64]) } {
@@ -4537,6 +4538,8 @@ proc check_effective_target_sync_long_long_runtime { } {
 		}
 	    } ""
 	}]
+    } elseif { [istarget aarch64*-*-*] } {
+	return 1
     } elseif { [istarget arm*-*-linux-*] } {
 	return [check_runtime sync_longlong_runtime {
 	    #include <stdlib.h>