diff --git a/CMakeLists.txt b/CMakeLists.txt
index e3fc86af2..46cee8465 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -77,6 +77,7 @@ set(plasma_LIB_SRCS
     widgets/radiobutton.cpp
     widgets/signalplotter.cpp
     widgets/slider.cpp
+    widgets/tabbar.cpp
     widgets/textedit.cpp
     widgets/webcontent.cpp
 )
@@ -180,6 +181,7 @@ install(FILES
     widgets/radiobutton.h
     widgets/signalplotter.h
     widgets/slider.h
+    widgets/tabbar.h
     widgets/textedit.h
     widgets/webcontent.h
     DESTINATION ${INCLUDE_INSTALL_DIR}/plasma/widgets COMPONENT Devel)
diff --git a/widgets/tabbar.h b/widgets/tabbar.h
index 0bcbf907b..5462b844f 100644
--- a/widgets/tabbar.h
+++ b/widgets/tabbar.h
@@ -24,7 +24,7 @@
 #include <QtGui/QGraphicsWidget>
 #include <QtGui/QTabBar>
 
-#include "plasma_export.h"
+#include <plasma/plasma_export.h>
 
 class QString;
 class QIcon;