diff --git a/src/atcore.cpp b/src/atcore.cpp
--- a/src/atcore.cpp
+++ b/src/atcore.cpp
@@ -617,7 +617,7 @@
 }
 QStringList AtCore::portSpeeds() const
 {
-    return serial()->validBaudRates();
+    return Serial::validBaudRates;
 }
 
 void AtCore::setIdleHold(uint delay)
diff --git a/src/seriallayer.h b/src/seriallayer.h
--- a/src/seriallayer.h
+++ b/src/seriallayer.h
@@ -115,10 +115,26 @@
      */
     bool commandAvailable() const;
 
-    /**
-     * @brief Return a QStringList of valids serial baud rates
-     *
-     * @return QStringList
-     */
-    QStringList validBaudRates() const;
 };
+/**
+ * @brief Serial::validBaudRates
+ * Return a QStringList of valids serial baud rates
+ */
+namespace Serial
+{
+static const QStringList validBaudRates = {
+    QStringList() <<
+                  QStringLiteral("9600") <<
+                  QStringLiteral("14400") <<
+                  QStringLiteral("19200") <<
+                  QStringLiteral("28800") <<
+                  QStringLiteral("38400") <<
+                  QStringLiteral("57600") <<
+                  QStringLiteral("76800") <<
+                  QStringLiteral("115200") <<
+                  QStringLiteral("230400") <<
+                  QStringLiteral("250000") <<
+                  QStringLiteral("500000") <<
+                  QStringLiteral("1000000")
+};
+}
diff --git a/src/seriallayer.cpp b/src/seriallayer.cpp
--- a/src/seriallayer.cpp
+++ b/src/seriallayer.cpp
@@ -34,20 +34,6 @@
 QByteArray _return = QByteArray("\r");
 QByteArray _newLine = QByteArray("\n");
 QByteArray _newLineReturn = QByteArray("\n\r");
-QStringList _validBaudRates = {
-    QStringLiteral("9600"),
-    QStringLiteral("14400"),
-    QStringLiteral("19200"),
-    QStringLiteral("28800"),
-    QStringLiteral("38400"),
-    QStringLiteral("57600"),
-    QStringLiteral("76800"),
-    QStringLiteral("115200"),
-    QStringLiteral("230400"),
-    QStringLiteral("250000"),
-    QStringLiteral("500000"),
-    QStringLiteral("1000000")
-};
 }
 
 /**
@@ -145,7 +131,3 @@
     return !d->_rByteCommands.isEmpty();
 }
 
-QStringList SerialLayer::validBaudRates() const
-{
-    return _validBaudRates;
-}