diff --git a/test/MC/AsmParser/X86/x86_32-mismatched-add.s b/test/MC/AsmParser/X86/x86_32-mismatched-add.s
new file mode 100644
index 00000000000..0840c65ca95
--- /dev/null
+++ b/test/MC/AsmParser/X86/x86_32-mismatched-add.s
@@ -0,0 +1,8 @@
+// RUN: llvm-mc -triple i386-unknown-unknown --show-encoding %s | FileCheck %s
+// XFAIL: *
+
+// CHECK: addl	$4294967295, %eax       # encoding: [0x83,0xc0,0xff]
+        addl $0xFFFFFFFF, %eax
+
+// CHECK: addl	$65535, %eax       # encoding: [0x66,0x83,0xc0,0xff]
+        addw $0xFFFF, %ax