diff --git a/src/cpu/static_inst.hh b/src/cpu/static_inst.hh
index bf07e06c7..cb32f2333 100644
--- a/src/cpu/static_inst.hh
+++ b/src/cpu/static_inst.hh
@@ -159,6 +159,7 @@ class StaticInstBase : public RefCounted
         IsSerializeAfter,
         IsMemBarrier,   ///< Is a memory barrier
         IsWriteBarrier, ///< Is a write barrier
+        IsReadBarrier,  ///< Is a read barrier
         IsERET, /// <- Causes the IFU to stall (MIPS ISA)
 
         IsNonSpeculative, ///< Should not be executed speculatively