diff --git a/src/plugins/cmakeprojectmanager/cmakebuildconfiguration.cpp b/src/plugins/cmakeprojectmanager/cmakebuildconfiguration.cpp
index 93593392e96..57f8c36303a 100644
--- a/src/plugins/cmakeprojectmanager/cmakebuildconfiguration.cpp
+++ b/src/plugins/cmakeprojectmanager/cmakebuildconfiguration.cpp
@@ -105,8 +105,9 @@ bool CMakeBuildConfiguration::fromMap(const QVariantMap &map)
         return false;
 
     const CMakeConfig conf
-    = Utils::transform(map.value(QLatin1String(CONFIGURATION_KEY)).toStringList(),
-                       [](const QString &v) { return CMakeConfigItem::fromString(v); });
+            = Utils::filtered(Utils::transform(map.value(QLatin1String(CONFIGURATION_KEY)).toStringList(),
+                                               [](const QString &v) { return CMakeConfigItem::fromString(v); }),
+                              [](const CMakeConfigItem &c) { return !c.isNull(); });
 
     // Legacy (pre QtC 3.7):
     const QStringList args = QtcProcess::splitArgs(map.value(QLatin1String(INITIAL_ARGUMENTS)).toString());