diff --git a/src/plugins/debugger/commonoptionspage.cpp b/src/plugins/debugger/commonoptionspage.cpp
index 24138b192cd..fc0f22e1a47 100644
--- a/src/plugins/debugger/commonoptionspage.cpp
+++ b/src/plugins/debugger/commonoptionspage.cpp
@@ -236,7 +236,7 @@ void CommonOptionsPageWidget::apply()
     for (auto it = allPathMap.begin(), end = allPathMap.end(); it != end; ++it) {
         const QString key = it.key();
         if (key.startsWith('('))
-            options->sourcePathRegExpMap.append(qMakePair(QRegExp(key), it.value()));
+            options->sourcePathRegExpMap.append(qMakePair(QRegularExpression(key), it.value()));
         else
             options->sourcePathMap.insert(key, it.value());
     }
diff --git a/src/plugins/debugger/debuggeractions.cpp b/src/plugins/debugger/debuggeractions.cpp
index 9df57cb430c..631bb881546 100644
--- a/src/plugins/debugger/debuggeractions.cpp
+++ b/src/plugins/debugger/debuggeractions.cpp
@@ -87,7 +87,7 @@ void GlobalDebuggerOptions::fromSettings()
              const QString key = s->value(sourcePathMappingSourceKey).toString();
              const QString value = s->value(sourcePathMappingTargetKey).toString();
              if (key.startsWith('('))
-                 sourcePathRegExpMap.append(qMakePair(QRegExp(key), value));
+                 sourcePathRegExpMap.append(qMakePair(QRegularExpression(key), value));
              else
                  sourcePathMap.insert(key, value);
         }
diff --git a/src/plugins/debugger/debuggeractions.h b/src/plugins/debugger/debuggeractions.h
index 61f5df39aa9..30dbe7b9af9 100644
--- a/src/plugins/debugger/debuggeractions.h
+++ b/src/plugins/debugger/debuggeractions.h
@@ -28,7 +28,7 @@
 #include <QCoreApplication>
 #include <QHash>
 #include <QMap>
-#include <QRegExp>
+#include <QRegularExpression>
 #include <QVector>
 
 namespace Utils { class SavedAction; }
@@ -37,7 +37,7 @@ namespace Debugger {
 namespace Internal {
 
 using SourcePathMap = QMap<QString, QString>;
-using SourcePathRegExpMap = QVector<QPair<QRegExp, QString> >;
+using SourcePathRegExpMap = QVector<QPair<QRegularExpression, QString>>;
 
 // Global debugger options that are not stored as saved action.
 class GlobalDebuggerOptions
diff --git a/src/plugins/debugger/debuggerengine.cpp b/src/plugins/debugger/debuggerengine.cpp
index 0c604841ab9..1e0006f5d74 100644
--- a/src/plugins/debugger/debuggerengine.cpp
+++ b/src/plugins/debugger/debuggerengine.cpp
@@ -2827,10 +2827,10 @@ void CppDebuggerEngine::validateRunParameters(DebuggerRunParameters &rp)
                     for (auto itExp = globalRegExpSourceMap.begin(), itEnd = globalRegExpSourceMap.end();
                          itExp != itEnd;
                          ++itExp) {
-                        QRegExp exp = itExp->first;
-                        int index = exp.indexIn(string);
-                        if (index != -1) {
-                            rp.sourcePathMap.insert(string.left(index) + exp.cap(1), itExp->second);
+                        const QRegularExpressionMatch match = itExp->first.match(string);
+                        if (match.hasMatch()) {
+                            rp.sourcePathMap.insert(string.left(match.capturedStart()) + match.captured(1),
+                                                    itExp->second);
                             found = true;
                             break;
                         }