diff --git a/site_scons/gem5_scons/defaults.py b/site_scons/gem5_scons/defaults.py
index 996cfd495f..f800b6755c 100644
--- a/site_scons/gem5_scons/defaults.py
+++ b/site_scons/gem5_scons/defaults.py
@@ -67,6 +67,7 @@ def EnvDefaults(env):
             "LINKFLAGS_EXTRA",
             "LANG",
             "LC_CTYPE",
+            "DISPLAY",
         ]
     )