diff --git a/src/qt/guiutil.cpp b/src/qt/guiutil.cpp
--- a/src/qt/guiutil.cpp
+++ b/src/qt/guiutil.cpp
@@ -83,6 +83,14 @@
 
 namespace GUIUtil {
 
+/**
+ * Number of service flag bits to consider (from bit 0) for display in peer
+ * details view. Correspondig bits are whether translated to some human readable
+ * text (e.g. NODE_NETWORK is displayed as "NETWORK") or as "UNKNOWN" with the
+ * bit position.
+ */
+static const size_t SERVICE_FLAG_DISPLAY_BITS = 11;
+
 QString dateTimeStr(const QDateTime &date) {
     return date.date().toString(Qt::SystemLocaleShortDate) + QString(" ") +
            date.toString("hh:mm");
@@ -887,8 +895,8 @@
 QString formatServicesStr(quint64 mask) {
     QStringList strList;
 
-    // Just scan the last 11 bits for now.
-    for (int i = 0; i < 11; i++) {
+    // Just scan the last SERVICE_FLAG_DISPLAY_BITS for now.
+    for (size_t i = 0; i < SERVICE_FLAG_DISPLAY_BITS; i++) {
         uint64_t check = 1 << i;
         if (mask & check) {
             switch (check) {