diff --git a/compiler/optimizing/code_generator_x86.cc b/compiler/optimizing/code_generator_x86.cc
index 4053f55..82d1fda 100644
--- a/compiler/optimizing/code_generator_x86.cc
+++ b/compiler/optimizing/code_generator_x86.cc
@@ -6755,8 +6755,8 @@
   return 0;
 }
 
-// Interface case has 3 temps, one for holding the number of interfaces, one for the current
-// interface pointer, one for loading the current interface.
+// Interface case has 2 temps, one for holding the number of interfaces, one for the current
+// interface pointer, the current interface is compared in memory.
 // The other checks have one temp for loading the object's class.
 static size_t NumberOfCheckCastTemps(TypeCheckKind type_check_kind) {
   if (type_check_kind == TypeCheckKind::kInterfaceCheck) {
@@ -7069,9 +7069,7 @@
   } else {
     locations->SetInAt(1, Location::Any());
   }
-  // Note that TypeCheckSlowPathX86 uses this "temp" register too.
-  locations->AddTemp(Location::RequiresRegister());
-  // When read barriers are enabled, we need an additional temporary register for some cases.
+  // Add temps for read barriers and other uses. One is used by TypeCheckSlowPathX86.
   locations->AddRegisterTemps(NumberOfCheckCastTemps(type_check_kind));
 }