diff --git a/core/mixertoolbox.h b/core/mixertoolbox.h
--- a/core/mixertoolbox.h
+++ b/core/mixertoolbox.h
@@ -38,15 +38,15 @@
  * very different and cannot be changed (e.g. KPanelApplet) without major headache.
  */
 
-namespace MixerToolBox KMIXCORE_EXPORT
+namespace MixerToolBox
 {
-    QString initMixer(bool multiDriverFlag, const QStringList &backendList, bool hotplug);
+    QString KMIXCORE_EXPORT initMixer(bool multiDriverFlag, const QStringList &backendList, bool hotplug);
 
-    void deinitMixer();
-    bool possiblyAddMixer(Mixer *mixer);
-    void removeMixer(Mixer *mixer);
-    void setMixerIgnoreExpression(const QString &ignoreExpr);
-    QString mixerIgnoreExpression();
+    void KMIXCORE_EXPORT deinitMixer();
+    bool KMIXCORE_EXPORT possiblyAddMixer(Mixer *mixer);
+    void KMIXCORE_EXPORT removeMixer(Mixer *mixer);
+    void KMIXCORE_EXPORT setMixerIgnoreExpression(const QString &ignoreExpr);
+    QString KMIXCORE_EXPORT mixerIgnoreExpression();
 }
 
 #endif