diff --git a/lib/base/qstring.cpp b/lib/base/qstring.cpp
index 4ac2d206a..30538c509 100644
--- a/lib/base/qstring.cpp
+++ b/lib/base/qstring.cpp
@@ -159,6 +159,11 @@ String::ConstIterator String::End(void) const
 	return m_Data.end();
 }
 
+double String::ToDouble(void) const
+{
+	return strtod(CStr(), NULL);
+}
+
 ostream& icinga::operator<<(ostream& stream, const String& str)
 {
 	stream << static_cast<std::string>(str);
diff --git a/lib/base/qstring.h b/lib/base/qstring.h
index 07b7f0474..298b9e1fc 100644
--- a/lib/base/qstring.h
+++ b/lib/base/qstring.h
@@ -87,6 +87,8 @@ public:
 	Iterator End(void);
 	ConstIterator End(void) const;
 
+	double ToDouble(void) const;
+
 	static const size_t NPos;
 
 private: