diff --git a/target-ppc/cpu.h b/target-ppc/cpu.h
index b8b09b9..7cacb56 100644
--- a/target-ppc/cpu.h
+++ b/target-ppc/cpu.h
@@ -1870,8 +1870,10 @@
     PPC2_PRCNTL        = 0x0000000000000008ULL,
     /* Byte-reversed, indexed, double-word load and store                    */
     PPC2_DBRX          = 0x0000000000000010ULL,
+    /* Book I 2.05 PowerPC specification                                     */
+    PPC2_ISA205        = 0x0000000000000020ULL,
 
-#define PPC_TCG_INSNS2 (PPC2_BOOKE206 | PPC2_PRCNTL | PPC2_DBRX)
+#define PPC_TCG_INSNS2 (PPC2_BOOKE206 | PPC2_PRCNTL | PPC2_DBRX | PPC2_ISA205)
 };
 
 /*****************************************************************************/
diff --git a/target-ppc/translate_init.c b/target-ppc/translate_init.c
index b0e3536..6feb62a 100644
--- a/target-ppc/translate_init.c
+++ b/target-ppc/translate_init.c
@@ -7042,7 +7042,7 @@
                        PPC_64B | PPC_ALTIVEC |
                        PPC_SEGMENT_64B | PPC_SLBI |
                        PPC_POPCNTB | PPC_POPCNTWD;
-    pcc->insns_flags2 = PPC2_VSX | PPC2_DFP | PPC2_DBRX;
+    pcc->insns_flags2 = PPC2_VSX | PPC2_DFP | PPC2_DBRX | PPC2_ISA205;
     pcc->msr_mask = 0x800000000204FF36ULL;
     pcc->mmu_model = POWERPC_MMU_2_06;
 #if defined(CONFIG_SOFTMMU)