diff --git a/qemu/target-i386/unicorn.c b/qemu/target-i386/unicorn.c
index ac0ebabd..7fdb5055 100644
--- a/qemu/target-i386/unicorn.c
+++ b/qemu/target-i386/unicorn.c
@@ -123,11 +123,11 @@ void x86_reg_reset(uch handle)
         default:
             break;
         case UC_MODE_32:
-            env->hflags |= HF_CS32_MASK | HF_SS32_MASK;
+            env->hflags |= HF_CS32_MASK | HF_SS32_MASK | HF_OSFXSR_MASK;
             env->cr[0] = CR0_PE_MASK;   // protected mode
             break;
         case UC_MODE_64:
-            env->hflags |= HF_CS32_MASK | HF_SS32_MASK | HF_CS64_MASK | HF_LMA_MASK;
+            env->hflags |= HF_CS32_MASK | HF_SS32_MASK | HF_CS64_MASK | HF_LMA_MASK | HF_OSFXSR_MASK;
             env->hflags &= ~(HF_ADDSEG_MASK);
             env->cr[0] = CR0_PE_MASK;   // protected mode
             break;