diff --git a/src/plugins/qbsprojectmanager/qbsproject.cpp b/src/plugins/qbsprojectmanager/qbsproject.cpp
index f0de5fe9522..08e65445cb4 100644
--- a/src/plugins/qbsprojectmanager/qbsproject.cpp
+++ b/src/plugins/qbsprojectmanager/qbsproject.cpp
@@ -888,7 +888,9 @@ static RawProjectParts generateProjectParts(
             rpp.setFlagsForC({cToolChain.get(), cFlags});
             rpp.setFlagsForCxx({cxxToolChain.get(), cxxFlags});
 
-            rpp.setMacros(transform<QVector>(arrayToStringList(props.value("cpp.defines")),
+            const QStringList defines = arrayToStringList(props.value("cpp.defines"))
+                    + arrayToStringList(props.value("cpp.platformDefines"));
+            rpp.setMacros(transform<QVector>(defines,
                     [](const QString &s) { return Macro::fromKeyValue(s); }));
 
             ProjectExplorer::HeaderPaths grpHeaderPaths;
diff --git a/src/plugins/qbsprojectmanager/qbssession.cpp b/src/plugins/qbsprojectmanager/qbssession.cpp
index 5ba4b84c5a8..14cdea8095f 100644
--- a/src/plugins/qbsprojectmanager/qbssession.cpp
+++ b/src/plugins/qbsprojectmanager/qbssession.cpp
@@ -392,6 +392,7 @@ void QbsSession::insertRequestedModuleProperties(QJsonObject &request)
         "cpp.minimumDarwinVersionCompilerFlag",
         "cpp.platformCommonCompilerFlags",
         "cpp.platformDriverFlags",
+        "cpp.platformDefines",
         "cpp.positionIndependentCode",
         "cpp.systemFrameworkPaths",
         "cpp.systemIncludePaths",