diff --git a/test/MC/Disassembler/X86/x86-32.txt b/test/MC/Disassembler/X86/x86-32.txt
index 99d49943b15..2017b7a32eb 100644
--- a/test/MC/Disassembler/X86/x86-32.txt
+++ b/test/MC/Disassembler/X86/x86-32.txt
@@ -630,3 +630,9 @@
 
 # CHECK: movntss %xmm0, (%edi)
 0xf3 0x0f 0x2b 0x07
+
+# CHECK: prefetch (%eax)
+0x0f 0x0d 0x00
+
+# CHECK: prefetchw (%eax)
+0x0f 0x0d 0x08