diff --git a/src/cpu/static_inst.hh b/src/cpu/static_inst.hh
index c9eb6ff24..032a304ad 100644
--- a/src/cpu/static_inst.hh
+++ b/src/cpu/static_inst.hh
@@ -72,7 +72,7 @@ namespace Trace {
     class InstRecord;
 }
 
-typedef uint32_t MicroPC;
+typedef uint16_t MicroPC;
 
 static const MicroPC MicroPCRomBit = 1 << (sizeof(MicroPC) * 8 - 1);