diff --git a/compat.h b/compat.h
new file mode 100644
index 00000000..a31a81ec
--- /dev/null
+++ b/compat.h
@@ -0,0 +1,19 @@
+// Copyright (c) 2026, Nick Korotysh
+#pragma once
+
+/*
+ * This file contains various compatibility stuff
+ * to support builds with both Qt 5 and Qt 6.
+ *
+ * It should be dropped with Qt 5 build support.
+ */
+
+#if QT_VERSION < QT_VERSION_CHECK(5, 14, 0)
+#include <QString>
+// QString::SplitBehavior is obsolete since Qt 5.14,
+// and was completely removed in Qt 6.
+namespace Qt {
+// create aliases to emulate required values in old Qt
+constexpr auto SkipEmptyParts = QString::SkipEmptyParts;
+}
+#endif
diff --git a/identifier/biomeidentifier.cpp b/identifier/biomeidentifier.cpp
index dd959a2c..c000f6c3 100644
--- a/identifier/biomeidentifier.cpp
+++ b/identifier/biomeidentifier.cpp
@@ -9,6 +9,7 @@ Copyright (c) 2016, EtlamGit
 
 #include "biomeidentifier.h"
 #include "clamp.h"
+#include "compat.h"
 
 // --------- --------- --------- ---------
 // BiomeInfo
@@ -376,7 +377,7 @@ void BiomeIdentifier::parseBiomeDefinitions2800(QJsonArray data18, int pack) {
       else {
         // construct the name from NID
         QString nid = QString(biome->nid).replace("minecraft:","").replace("_"," ").replace(":",": ");
-        QStringList parts = nid.toLower().split(' ', QString::SkipEmptyParts);
+        QStringList parts = nid.toLower().split(' ', Qt::SkipEmptyParts);
         for (int i = 0; i < parts.size(); i++)
           parts[i].replace(0, 1, parts[i][0].toUpper());
         biome->name = parts.join(" ");
diff --git a/identifier/dimensionidentifier.cpp b/identifier/dimensionidentifier.cpp
index c5cff483..b037aab8 100644
--- a/identifier/dimensionidentifier.cpp
+++ b/identifier/dimensionidentifier.cpp
@@ -4,6 +4,7 @@
 
 #include "dimensionidentifier.h"
 #include "worldinfo.h"
+#include "compat.h"
 
 
 //-------------------------------------------------------------------------------------------------
@@ -73,7 +74,7 @@ int DimensionIdentifier::addDefinitions(QJsonArray defs, int pack) {
       dim->id = dimTag.value("id").toString();
       // construct a default name from ID
       QString nid = QString(dim->id).replace("minecraft:","").replace("_"," ");
-      QStringList parts = nid.toLower().split(' ', QString::SkipEmptyParts);
+      QStringList parts = nid.toLower().split(' ', Qt::SkipEmptyParts);
       for (int i = 0; i < parts.size(); i++)
         parts[i].replace(0, 1, parts[i][0].toUpper());
       dim->name = parts.join(" ");
diff --git a/overlay/generatedstructure.cpp b/overlay/generatedstructure.cpp
index 3f0c6862..695257be 100644
--- a/overlay/generatedstructure.cpp
+++ b/overlay/generatedstructure.cpp
@@ -1,8 +1,10 @@
 /** Copyright 2014 Rian Shelley */
 #include <QPainter>
+#include <QRegularExpression>
 
 #include "overlay/generatedstructure.h"
 #include "nbt/nbt.h"
+#include "compat.h"
 
 
 // parse structures in *.dat files
@@ -100,7 +102,7 @@ GeneratedStructure::tryParseSpawner(const Tag* tagSpawner) {
     mobType = tagSpawner->at("EntityId")->toString();
     // reformat CamelCase text to flattening
     // split at uppercase characters
-    QStringList tokens = mobType.split(QRegExp("(?<=[a-z])(?=[A-Z])"), QString::SkipEmptyParts);
+    QStringList tokens = mobType.split(QRegularExpression("(?<=[a-z])(?=[A-Z])"), Qt::SkipEmptyParts);
     mobType = tokens.join("_").toLower();
   }
   // after "The Flattening"