diff --git a/CHANGELOG.md b/CHANGELOG.md
index bcb2a256..fb0b103f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -11,6 +11,7 @@ and this project somewhat adheres to [Semantic Versioning](https://semver.org/sp
 ### Fixed
 - Fix duplicated maps writing the wrong name.
 - Fix small maps being difficult to see while resizing.
+- Fix expressions using the prefix '0X' as opposed to '0x' not being recognized has hex numbers.
 
 ## [6.0.0] - 2025-05-26
 ### Breaking Changes
diff --git a/src/core/parseutil.cpp b/src/core/parseutil.cpp
index 27dc8c0d..4dfb06da 100644
--- a/src/core/parseutil.cpp
+++ b/src/core/parseutil.cpp
@@ -185,7 +185,7 @@ QList<Token> ParseUtil::tokenizeExpression(QString expression) {
     QList<Token> tokens;
 
     static const QStringList tokenTypes = {"hex", "decimal", "identifier", "operator", "leftparen", "rightparen"};
-    static const QRegularExpression re("^(?<hex>0x[0-9a-fA-F]+)|(?<decimal>[0-9]+)|(?<identifier>[a-zA-Z_0-9]+)|(?<operator>[+\\-*\\/<>|^%]+)|(?<leftparen>\\()|(?<rightparen>\\))");
+    static const QRegularExpression re("^(?<hex>0[xX][0-9a-fA-F]+)|(?<decimal>\\d+)|(?<identifier>\\w+)|(?<operator>[+\\-*\\/<>|^%]+)|(?<leftparen>\\()|(?<rightparen>\\))");
 
     expression = expression.trimmed();
     while (!expression.isEmpty()) {