diff --git a/gcc/ada/ChangeLog b/gcc/ada/ChangeLog
index d7662e73091a..d425a70be430 100644
--- a/gcc/ada/ChangeLog
+++ b/gcc/ada/ChangeLog
@@ -1,3 +1,7 @@
+2012-07-27  Iain Sandoe  <iain@codesourcery.com>
+
+	* system-darwin-ppc64.ads: Add Support_Atomic_Primitives, set to True.
+
 2012-07-25  Eric Botcazou  <ebotcazou@adacore.com>
 
 	* gcc-interface/utils2.c (gnat_stabilize_reference) <BIT_FIELD_REF>: Do
diff --git a/gcc/ada/system-darwin-ppc64.ads b/gcc/ada/system-darwin-ppc64.ads
index 6d4c61651d86..feaff2ed3ea9 100644
--- a/gcc/ada/system-darwin-ppc64.ads
+++ b/gcc/ada/system-darwin-ppc64.ads
@@ -137,6 +137,7 @@ private
    Stack_Check_Limits        : constant Boolean := False;
    Support_64_Bit_Divides    : constant Boolean := True;
    Support_Aggregates        : constant Boolean := True;
+   Support_Atomic_Primitives : constant Boolean := True;
    Support_Composite_Assign  : constant Boolean := True;
    Support_Composite_Compare : constant Boolean := True;
    Support_Long_Shifts       : constant Boolean := True;