diff --git a/src/gui/DatabaseOpenWidget.cpp b/src/gui/DatabaseOpenWidget.cpp
index 7e34176d..9647f88e 100644
--- a/src/gui/DatabaseOpenWidget.cpp
+++ b/src/gui/DatabaseOpenWidget.cpp
@@ -99,7 +99,8 @@ void DatabaseOpenWidget::openDatabase()
 
     QFile file(m_filename);
     if (!file.open(QIODevice::ReadOnly)) {
-        // TODO: error message
+        MessageBox::warning(this, tr("Error"), tr("Unable to open the database.").append("\n")
+                            .append(file.errorString()));
         return;
     }
     if (m_db) {
diff --git a/src/gui/DatabaseRepairWidget.cpp b/src/gui/DatabaseRepairWidget.cpp
index f1b760f9..e48e0f1f 100644
--- a/src/gui/DatabaseRepairWidget.cpp
+++ b/src/gui/DatabaseRepairWidget.cpp
@@ -60,7 +60,8 @@ void DatabaseRepairWidget::openDatabase()
 
     QFile file(m_filename);
     if (!file.open(QIODevice::ReadOnly)) {
-        // TODO: error message
+        MessageBox::warning(this, tr("Error"), tr("Unable to open the database.").append("\n")
+                            .append(file.errorString()));
         Q_EMIT editFinished(false);
         return;
     }
diff --git a/src/gui/DatabaseTabWidget.cpp b/src/gui/DatabaseTabWidget.cpp
index 3d03093d..c3b17dc6 100644
--- a/src/gui/DatabaseTabWidget.cpp
+++ b/src/gui/DatabaseTabWidget.cpp
@@ -131,11 +131,10 @@ void DatabaseTabWidget::openDatabase(const QString& fileName, const QString& pw,
 
     // test if we can read/write or read the file
     QFile file(fileName);
-    // TODO: error handling
     if (!file.open(QIODevice::ReadWrite)) {
         if (!file.open(QIODevice::ReadOnly)) {
-            // can't open
-            // TODO: error message
+            MessageBox::warning(this, tr("Error"), tr("Unable to open the database.").append("\n")
+                                .append(file.errorString()));
             return;
         }
         else {
diff --git a/src/gui/KeePass1OpenWidget.cpp b/src/gui/KeePass1OpenWidget.cpp
index 96ddf13f..4f70a978 100644
--- a/src/gui/KeePass1OpenWidget.cpp
+++ b/src/gui/KeePass1OpenWidget.cpp
@@ -49,7 +49,8 @@ void KeePass1OpenWidget::openDatabase()
 
     QFile file(m_filename);
     if (!file.open(QIODevice::ReadOnly)) {
-        // TODO: error message
+        MessageBox::warning(this, tr("Error"), tr("Unable to open the database.").append("\n")
+                            .append(file.errorString()));
         return;
     }
     if (m_db) {