diff --git a/src/corelib/global/qlogging.cpp b/src/corelib/global/qlogging.cpp
index c369259788d..11a43f73efc 100644
--- a/src/corelib/global/qlogging.cpp
+++ b/src/corelib/global/qlogging.cpp
@@ -1263,6 +1263,18 @@ void QMessagePattern::setPattern(const QString &pattern)
 
 #if defined(QLOGGING_HAVE_BACKTRACE) && !defined(QT_BOOTSTRAPPED)
 // make sure the function has "Message" in the name so the function is removed
+/*
+  A typical backtrace in debug mode looks like:
+    #0  backtraceFramesForLogMessage (frameCount=5) at qlogging.cpp:1296
+    #1  formatBacktraceForLogMessage (backtraceParams=..., function=0x4040b8 "virtual void MyClass::myFunction(int)") at qlogging.cpp:1344
+    #2  qFormatLogMessage (type=QtDebugMsg, context=..., str=...) at qlogging.cpp:1452
+    #3  stderr_message_handler (type=QtDebugMsg, context=..., message=...) at qlogging.cpp:1744
+    #4  qDefaultMessageHandler (type=QtDebugMsg, context=..., message=...) at qlogging.cpp:1795
+    #5  qt_message_print (msgType=QtDebugMsg, context=..., message=...) at qlogging.cpp:1840
+    #6  qt_message_output (msgType=QtDebugMsg, context=..., message=...) at qlogging.cpp:1891
+    #7  QDebug::~QDebug (this=<optimized out>, __in_chrg=<optimized out>) at qdebug.h:111
+*/
+static constexpr int TypicalBacktraceFrameCount = 8;
 
 #if (defined(Q_CC_GNU) || __has_attribute(optimize)) \
     && !defined(Q_CC_INTEL) && !defined(Q_CC_CLANG)
@@ -1282,7 +1294,7 @@ static QStringList backtraceFramesForLogMessage(int frameCount)
     // This code is protected by QMessagePattern::mutex so it is thread safe on all compilers
     static const QRegularExpression rx(QStringLiteral("^(?:[^(]*/)?([^(/]+)\\(([^+]*)(?:[\\+[a-f0-9x]*)?\\) \\[[a-f0-9x]*\\]$"));
 
-    QVarLengthArray<void *, 32> buffer(8 + frameCount);
+    QVarLengthArray<void *, 32> buffer(TypicalBacktraceFrameCount + frameCount);
     int n = backtrace(buffer.data(), buffer.size());
     if (n > 0) {
         int numberPrinted = 0;