diff --git a/lang/qt/src/qgpgmerefreshsmimekeysjob.cpp b/lang/qt/src/qgpgmerefreshsmimekeysjob.cpp
index 3187a0cd..3e430ad7 100644
--- a/lang/qt/src/qgpgmerefreshsmimekeysjob.cpp
+++ b/lang/qt/src/qgpgmerefreshsmimekeysjob.cpp
@@ -94,7 +94,7 @@ GpgME::Error QGpgMERefreshSMIMEKeysJob::start(const std::vector<GpgME::Key> &key
         return {};
     }
 
-    const bool gotWrongKeys = std::any_of(std::begin(keys), std::end(keys), [](const auto &k) {
+    const bool gotWrongKeys = std::any_of(std::begin(keys), std::end(keys), [](const GpgME::Key &k) {
         return k.protocol() != GpgME::CMS;
     });
     if (gotWrongKeys) {
diff --git a/lang/qt/src/qgpgmesignkeyjob.cpp b/lang/qt/src/qgpgmesignkeyjob.cpp
index 506d64a1..1693a5be 100644
--- a/lang/qt/src/qgpgmesignkeyjob.cpp
+++ b/lang/qt/src/qgpgmesignkeyjob.cpp
@@ -57,6 +57,15 @@ using namespace GpgME;
 namespace
 {
 struct TrustSignatureProperties {
+    TrustSignatureProperties() = default;
+    // needed for C++11 because until C++14 "aggregate initialization requires
+    // class type, that has no default member initializers"
+    TrustSignatureProperties(TrustSignatureTrust trust_, unsigned int depth_, const QString &scope_)
+        : trust{trust_}
+        , depth{depth_}
+        , scope{scope_}
+    {}
+
     TrustSignatureTrust trust = TrustSignatureTrust::None;
     unsigned int depth = 0;
     QString scope;
diff --git a/lang/qt/src/util.cpp b/lang/qt/src/util.cpp
index c6e1a6ae..d4190eb8 100644
--- a/lang/qt/src/util.cpp
+++ b/lang/qt/src/util.cpp
@@ -56,7 +56,7 @@ QStringList toFingerprints(const std::vector<GpgME::Key> &keys)
 {
     QStringList fprs;
     fprs.reserve(keys.size());
-    std::transform(std::begin(keys), std::end(keys), std::back_inserter(fprs), [](const auto &k) {
+    std::transform(std::begin(keys), std::end(keys), std::back_inserter(fprs), [](const GpgME::Key &k) {
         return QString::fromLatin1(k.primaryFingerprint());
     });
     return fprs;
diff --git a/lang/qt/tests/run-exportjob.cpp b/lang/qt/tests/run-exportjob.cpp
index 0f8fd8fd..40072c85 100644
--- a/lang/qt/tests/run-exportjob.cpp
+++ b/lang/qt/tests/run-exportjob.cpp
@@ -57,7 +57,7 @@ static void showUsageAndExitWithCode(int exitCode)
     exit(exitCode);
 }
 
-static auto createExportJob(unsigned int mode)
+static QGpgME::ExportJob *createExportJob(unsigned int mode)
 {
     if (mode & Context::ExportSecretSubkey) {
         return QGpgME::openpgp()->secretSubkeyExportJob(/*armor=*/true);