diff --git a/app/gui/qt/widgets/sonicpiscintilla.cpp b/app/gui/qt/widgets/sonicpiscintilla.cpp
index 0dcea986d4..eb67d33e36 100644
--- a/app/gui/qt/widgets/sonicpiscintilla.cpp
+++ b/app/gui/qt/widgets/sonicpiscintilla.cpp
@@ -14,7 +14,6 @@
 #include "profiler.h"
 #include "sonicpiscintilla.h"
 #include "dpi.h"
-#include <QRecursiveMutex>
 #include <QSettings>
 #include <QShortcut>
 #include <QDrag>
@@ -24,6 +23,9 @@
 #include <Qsci/qscilexer.h>
 #include <QCheckBox>
 #include <QRegularExpression>
+#if (QT_VERSION >= QT_VERSION_CHECK(5, 14, 0))
+#include <QRecursiveMutex>
+#endif
 
 SonicPiScintilla::SonicPiScintilla(SonicPiLexer *lexer, SonicPiTheme *theme, QString fileName, bool autoIndent)
   : QsciScintilla()
@@ -37,7 +39,11 @@ SonicPiScintilla::SonicPiScintilla(SonicPiLexer *lexer, SonicPiTheme *theme, QSt
   standardCommands()->clearAlternateKeys();
   QString skey;
   QSettings settings(QSettings::IniFormat, QSettings::UserScope, "sonic-pi.net", "gui-keys-bindings");
+#if (QT_VERSION >= QT_VERSION_CHECK(5, 14, 0))
   mutex = new QRecursiveMutex();
+#else
+  mutex = new QMutex(QMutex::Recursive);
+#endif
 
 #if defined(Q_OS_MAC)
   int SPi_CTRL = Qt::META;
diff --git a/app/gui/qt/widgets/sonicpiscintilla.h b/app/gui/qt/widgets/sonicpiscintilla.h
index 43c71ad15f..a28a14e3de 100644
--- a/app/gui/qt/widgets/sonicpiscintilla.h
+++ b/app/gui/qt/widgets/sonicpiscintilla.h
@@ -18,7 +18,9 @@
 #include "model/sonicpitheme.h"
 #include "widgets/sonicpilog.h"
 #include <QCheckBox>
+#if (QT_VERSION >= QT_VERSION_CHECK(5, 14, 0))
 #include <QRecursiveMutex>
+#endif
 
 class SonicPiLexer;
 class QSettings;
@@ -88,7 +90,11 @@ class SonicPiScintilla : public QsciScintilla
     void dragMoveEvent(QDragMoveEvent *event);
     bool event(QEvent *evt);
     bool autoIndent;
+#if (QT_VERSION >= QT_VERSION_CHECK(5, 14, 0))
     QRecursiveMutex *mutex;
+#else
+    QMutex *mutex;
+#endif
 
 };