diff --git a/src/plugins/valgrind/callgrind/callgrindparser.cpp b/src/plugins/valgrind/callgrind/callgrindparser.cpp
index dda06a50cde..68492394364 100644
--- a/src/plugins/valgrind/callgrind/callgrindparser.cpp
+++ b/src/plugins/valgrind/callgrind/callgrindparser.cpp
@@ -644,9 +644,8 @@ void Parser::parse(QIODevice *device)
     d->parse(device);
 }
 
-Parser::Parser(QObject *parent)
-    : QObject(parent),
-      d(new Private(this))
+Parser::Parser()
+    : d(new Private(this))
 {
 }
 
diff --git a/src/plugins/valgrind/callgrind/callgrindparser.h b/src/plugins/valgrind/callgrind/callgrindparser.h
index 40062f515d7..122e3323387 100644
--- a/src/plugins/valgrind/callgrind/callgrindparser.h
+++ b/src/plugins/valgrind/callgrind/callgrindparser.h
@@ -50,7 +50,7 @@ class Parser : public QObject
     Q_OBJECT
 
 public:
-    explicit Parser(QObject *parent = nullptr);
+    Parser();
     ~Parser() override;
 
     // get and take ownership of the parsing results. If this function is not called the repository