diff --git a/test/CodeGen/X86/cas.ll b/test/CodeGen/X86/cas.ll
index 12e49f94704..602f433fb2b 100644
--- a/test/CodeGen/X86/cas.ll
+++ b/test/CodeGen/X86/cas.ll
@@ -36,7 +36,7 @@ entry:
   ret i1 %tobool
 }
 
-; Make sure we're emitting a move from 
+; Make sure we're emitting a move from eax.
 ; CHECK: #APP
 ; CHECK-NEXT: lock;{{.*}}mov %eax,{{.*}}
 ; CHECK-NEXT: #NO_APP