diff --git a/src/plugins/qbsprojectmanager/defaultpropertyprovider.cpp b/src/plugins/qbsprojectmanager/defaultpropertyprovider.cpp
index 4026ba0ca7c..0d8796e9262 100644
--- a/src/plugins/qbsprojectmanager/defaultpropertyprovider.cpp
+++ b/src/plugins/qbsprojectmanager/defaultpropertyprovider.cpp
@@ -263,7 +263,7 @@ QVariantMap DefaultPropertyProvider::autoGeneratedProperties(const ProjectExplor
                     && sysrootAbs.startsWith(developerPath)) {
                 if (sysrootAbs.toLower().endsWith(QStringLiteral("/%1.sdk")
                                                   .arg(canonicalName + version)))
-                    data.insert(QLatin1String(XCODE_SDK), canonicalName + version);
+                    data.insert(QLatin1String(XCODE_SDK), QString(canonicalName + version));
                 if (sysrootAbs.toLower().endsWith(QStringLiteral("/%1.sdk")
                                                   .arg(canonicalName)))
                     data.insert(QLatin1String(XCODE_SDK), canonicalName);