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-rw-r--r--src/mem/coherent_xbar.hh2
1 files changed, 2 insertions, 0 deletions
diff --git a/src/mem/coherent_xbar.hh b/src/mem/coherent_xbar.hh
index 0f641664d..edfc47d4b 100644
--- a/src/mem/coherent_xbar.hh
+++ b/src/mem/coherent_xbar.hh
@@ -51,6 +51,8 @@
#ifndef __MEM_COHERENT_XBAR_HH__
#define __MEM_COHERENT_XBAR_HH__
+#include <unordered_set>
+
#include "mem/snoop_filter.hh"
#include "mem/xbar.hh"
#include "params/CoherentXBar.hh"