diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c
index 3108d7c..4192cd8 100644
--- a/hw/ppc/spapr.c
+++ b/hw/ppc/spapr.c
@@ -237,6 +237,10 @@
      * SSO (SAO) ordering is supported on KVM and thread=single hosts,
      * but not MTTCG, so disable it. To advertise it, a cap would have
      * to be added, or support implemented for MTTCG.
+     *
+     * Copy/paste is not supported by TCG, so it is not advertised. KVM
+     * can execute them but it has no accelerator drivers which are usable,
+     * so there isn't much need for it anyway.
      */
 
     uint8_t pa_features_206[] = { 6, 0,
@@ -260,8 +264,8 @@
         0x80, 0x00, 0x80, 0x00, 0x80, 0x00, /* 24 - 29 */
         /* 30: MMR, 32: LE atomic, 34: EBB + ext EBB */
         0x80, 0x00, 0x80, 0x00, 0xC0, 0x00, /* 30 - 35 */
-        /* 36: SPR SO, 38: Copy/Paste, 40: Radix MMU */
-        0x80, 0x00, 0x80, 0x00, 0x80, 0x00, /* 36 - 41 */
+        /* 36: SPR SO, 40: Radix MMU */
+        0x80, 0x00, 0x00, 0x00, 0x80, 0x00, /* 36 - 41 */
         /* 42: PM, 44: PC RA, 46: SC vec'd */
         0x80, 0x00, 0x80, 0x00, 0x80, 0x00, /* 42 - 47 */
         /* 48: SIMD, 50: QP BFP, 52: String */