diff --git a/proton b/proton
index df28d02b..1c076d27 100755
--- a/proton
+++ b/proton
@@ -938,6 +938,7 @@ def default_compat_config():
                 "305620", #The Long Dark
                 "585420", #Trailmakers
                 "684450", #Surviving the Aftermath
+                "780290", #Gloomhaven
                 "844260", #Rustler
                 "983970", #Haven
                 "1075200", #TOHU