diff --git a/src/intrinsic/llvm.rs b/src/intrinsic/llvm.rs
index 614bdbe26b8..3b9855ddc18 100644
--- a/src/intrinsic/llvm.rs
+++ b/src/intrinsic/llvm.rs
@@ -802,6 +802,7 @@ pub fn intrinsic<'gcc, 'tcx>(name: &str, cx: &CodegenCx<'gcc, 'tcx>) -> Function
         "llvm.x86.avx512.mask.cmp.b.128" => "__builtin_ia32_cmpb128_mask",
         "llvm.x86.xrstor" => "__builtin_ia32_xrstor",
         "llvm.x86.xsavec" => "__builtin_ia32_xsavec",
+        "llvm.x86.xsave64" => "__builtin_ia32_xsave64",
         "llvm.x86.addcarry.32" => "__builtin_ia32_addcarryx_u32",
         "llvm.x86.subborrow.32" => "__builtin_ia32_sbb_u32",
         "llvm.x86.avx512.mask.compress.store.w.512" => "__builtin_ia32_compressstoreuhi512_mask",