diff --git a/disas.c b/disas.c
index c8fb2129be..fd14f682ae 100644
--- a/disas.c
+++ b/disas.c
@@ -384,6 +384,9 @@ void monitor_disas(CPUState *env,
     print_insn = print_insn_arm;
 #elif defined(TARGET_SPARC)
     print_insn = print_insn_sparc;
+#ifdef TARGET_SPARC64
+    disasm_info.mach = bfd_mach_sparc_v9b;
+#endif
 #elif defined(TARGET_PPC)
 #ifdef TARGET_PPC64
     disasm_info.mach = bfd_mach_ppc64;