diff --git a/module003-ch007-swift-cluster-architecture.xml b/module003-ch007-swift-cluster-architecture.xml
index 7030aa6a..43f2bfb7 100644
--- a/module003-ch007-swift-cluster-architecture.xml
+++ b/module003-ch007-swift-cluster-architecture.xml
@@ -69,7 +69,7 @@
             provisioned with single gigabit or 10 gigabit network
             interface depending on expected workload and desired
             performance.</para>
-        <para>Currently 2TB or 3TB SATA disks deliver good
+        <para>Currently 2 TB or 3 TB SATA disks deliver good
             price/performance value. Desktop-grade drives can be used
             where there are responsive remote hands in the datacenter,
             and enterprise-grade drives can be used where this is not
@@ -86,4 +86,4 @@
                 (1GbE, bonded 1GbE pair, or 10GbE) should match your
                 desired concurrent throughput needs for reads and
                 writes.</para>
-</chapter>
\ No newline at end of file
+</chapter>