diff --git a/src/lib/session/restoremanager.cpp b/src/lib/session/restoremanager.cpp
index 3027f3d23..0d2715da4 100644
--- a/src/lib/session/restoremanager.cpp
+++ b/src/lib/session/restoremanager.cpp
@@ -100,6 +100,32 @@ static void loadVersion3(QDataStream &stream, RestoreData &data)
     }
 }
 
+// static
+bool RestoreManager::validateFile(const QString &file)
+{
+    if (!QFile::exists(file)) {
+        return false;
+    }
+
+    QFile recoveryFile(file);
+    if (!recoveryFile.open(QIODevice::ReadOnly)) {
+        return false;
+    }
+
+    QDataStream stream(&recoveryFile);
+
+    int version;
+    stream >> version;
+
+    if (version == Qz::sessionVersion || version == 0x0003 || version == (0x0003 | 0x050000)) {
+        int windowCount;
+        stream >> windowCount;
+        return windowCount > 0;
+    }
+
+    return false;
+}
+
 // static
 void RestoreManager::createFromFile(const QString &file, RestoreData &data)
 {
@@ -108,7 +134,10 @@ void RestoreManager::createFromFile(const QString &file, RestoreData &data)
     }
 
     QFile recoveryFile(file);
-    recoveryFile.open(QIODevice::ReadOnly);
+    if (!recoveryFile.open(QIODevice::ReadOnly)) {
+        return;
+    }
+
     QDataStream stream(&recoveryFile);
 
     int version;
diff --git a/src/lib/session/restoremanager.h b/src/lib/session/restoremanager.h
index 10f6cd426..e68ef4320 100644
--- a/src/lib/session/restoremanager.h
+++ b/src/lib/session/restoremanager.h
@@ -38,6 +38,7 @@ public:
 
     QObject *recoveryObject(WebPage *page);
 
+    static bool validateFile(const QString &file);
     static void createFromFile(const QString &file, RestoreData &data);
 
 private:
diff --git a/src/lib/session/sessionmanager.cpp b/src/lib/session/sessionmanager.cpp
index 483b91687..1b00a08a1 100644
--- a/src/lib/session/sessionmanager.cpp
+++ b/src/lib/session/sessionmanager.cpp
@@ -279,10 +279,8 @@ void SessionManager::fillSessionsMetaDataListIfNeeded()
 
     for (int i = 0; i < sessionFiles.size(); ++i) {
         const QFileInfo &fileInfo = sessionFiles.at(i);
-        RestoreData data;
-        RestoreManager::createFromFile(fileInfo.absoluteFilePath(), data);
 
-        if (data.isEmpty())
+        if (!RestoreManager::validateFile(fileInfo.absoluteFilePath()))
             continue;
 
         SessionMetaData metaData;
@@ -321,8 +319,8 @@ void SessionManager::loadSettings()
         m_lastActiveSessionPath = sessionsDir.absoluteFilePath(m_lastActiveSessionPath);
     }
 
-    // fallback to default session
-    if (!QFile::exists(m_lastActiveSessionPath))
+    // Fallback to default session
+    if (!RestoreManager::validateFile(m_lastActiveSessionPath))
         m_lastActiveSessionPath = defaultSessionPath();
 }