diff --git a/src/arch/x86/x86_traits.hh b/src/arch/x86/x86_traits.hh
index fa54c24e9..e45d62f8f 100644
--- a/src/arch/x86/x86_traits.hh
+++ b/src/arch/x86/x86_traits.hh
@@ -60,8 +60,7 @@
 
 namespace X86ISA
 {
-    //XXX This will definitely need to be something larger in the future.
-    const int NumMicroIntRegs = 0;
+    const int NumMicroIntRegs = 16;
 
     const int NumMMXRegs = 8;
     const int NumXMMRegs = 16;