diff --git a/sysconfigs/target/target-x86_64.conf b/sysconfigs/target/target-x86_64.conf
index 96e32e09e8..dc1a3ea50a 100644
--- a/sysconfigs/target/target-x86_64.conf
+++ b/sysconfigs/target/target-x86_64.conf
@@ -42,6 +42,20 @@
    xlevel = "0x8000000A"
    model_id = "Intel Core i7 9xx (Nehalem Class Core i7)"
 
+[cpudef]
+   name = "Westmere"
+   level = "11"
+   vendor = "GenuineIntel"
+   family = "6"
+   model = "44"
+   stepping = "1"
+   feature_edx = "sse2 sse fxsr mmx clflush pse36 pat cmov mca pge mtrr sep apic cx8 mce pae msr tsc pse de fpu"
+   feature_ecx = "aes popcnt sse4.2 sse4.1 cx16 ssse3 sse3"
+   extfeature_edx = "i64 syscall xd"
+   extfeature_ecx = "lahf_lm"
+   xlevel = "0x8000000A"
+   model_id = "Westmere E56xx/L56xx/X56xx (Nehalem-C)"
+
 [cpudef]
    name = "Opteron_G1"
    level = "5"