diff --git a/qemu/target/i386/unicorn.c b/qemu/target/i386/unicorn.c
index 1118759e..2a4d0bf5 100644
--- a/qemu/target/i386/unicorn.c
+++ b/qemu/target/i386/unicorn.c
@@ -66,7 +66,7 @@ void x86_reg_reset(struct uc_struct *uc)
     CPUArchState *env = uc->cpu->env_ptr;
 
     env->features[FEAT_1_EDX] = CPUID_CX8 | CPUID_CMOV | CPUID_SSE2 | CPUID_FXSR | CPUID_SSE | CPUID_CLFLUSH;
-    env->features[FEAT_1_ECX] = CPUID_EXT_SSSE3 | CPUID_EXT_SSE41 | CPUID_EXT_SSE42 | CPUID_EXT_AES;
+    env->features[FEAT_1_ECX] = CPUID_EXT_SSSE3 | CPUID_EXT_SSE41 | CPUID_EXT_SSE42 | CPUID_EXT_AES | CPUID_EXT_CX16;
     env->features[FEAT_8000_0001_EDX] = CPUID_EXT2_3DNOW | CPUID_EXT2_RDTSCP;
     env->features[FEAT_8000_0001_ECX] = CPUID_EXT3_LAHF_LM | CPUID_EXT3_ABM | CPUID_EXT3_SKINIT | CPUID_EXT3_CR8LEG;
     env->features[FEAT_7_0_EBX] = CPUID_7_0_EBX_BMI1 | CPUID_7_0_EBX_BMI2 | CPUID_7_0_EBX_ADX | CPUID_7_0_EBX_SMAP;