diff --git a/src/plugins/cmakeprojectmanager/cmakeconfigitem.cpp b/src/plugins/cmakeprojectmanager/cmakeconfigitem.cpp
index 90c2522aad1..05add0f63e7 100644
--- a/src/plugins/cmakeprojectmanager/cmakeconfigitem.cpp
+++ b/src/plugins/cmakeprojectmanager/cmakeconfigitem.cpp
@@ -27,6 +27,8 @@
 
 #include <utils/qtcassert.h>
 
+#include <QString>
+
 namespace CMakeProjectManager {
 
 // --------------------------------------------------------------------