diff --git a/src/protocol.h b/src/protocol.h
index 50d197415b..642dcc5394 100644
--- a/src/protocol.h
+++ b/src/protocol.h
@@ -276,6 +276,8 @@ enum ServiceFlags : uint64_t {
     // collisions and other cases where nodes may be advertising a service they
     // do not actually support. Other service bits should be allocated via the
     // BIP process.
+
+    NODE_REPLACE_BY_FEE = (1 << 26),
 };
 
 /**
diff --git a/src/qt/guiutil.cpp b/src/qt/guiutil.cpp
index 09eae77908..84e534bfc8 100644
--- a/src/qt/guiutil.cpp
+++ b/src/qt/guiutil.cpp
@@ -835,6 +835,9 @@ QString formatServicesStr(quint64 mask)
             case NODE_XTHIN:
                 strList.append("XTHIN");
                 break;
+            case NODE_REPLACE_BY_FEE:
+                strList.append("REPLACE_BY_FEE?");
+                break;
             default:
                 strList.append(QString("%1[%2]").arg("UNKNOWN").arg(check));
             }