diff --git a/syncplay/messages.py b/syncplay/messages.py
old mode 100644
new mode 100755
index 09531cf..3186259
--- a/syncplay/messages.py
+++ b/syncplay/messages.py
@@ -76,6 +76,7 @@ en = {
        "hostname-empty-error" : "Hostname can't be empty",
        "empty-error" : "{} can't be empty",  # Configuration
        "media-player-error": "Media player error: \"{}\"",  # Error line
+       "unable-import-gui-error": "Could not import Gui libraries. To use them, please install PySide.",
 
        "arguments-missing-error" : "Some necessary arguments are missing, refer to --help",
 
diff --git a/syncplay/ui/ConfigurationGetter.py b/syncplay/ui/ConfigurationGetter.py
old mode 100644
new mode 100755
index 373075b..3f330cb
--- a/syncplay/ui/ConfigurationGetter.py
+++ b/syncplay/ui/ConfigurationGetter.py
@@ -11,6 +11,7 @@ try:
     from PySide import QtGui  # @UnresolvedImport
     from PySide.QtCore import QCoreApplication
 except ImportError:
+    print getMessage("unable-import-gui-error")
     GuiConfiguration = None
 
 class InvalidConfigValue(Exception):