diff --git a/Tools/SOGoToolDumpDefaults.m b/Tools/SOGoToolDumpDefaults.m
index 2344c3a3c2..3aec1c4248 100644
--- a/Tools/SOGoToolDumpDefaults.m
+++ b/Tools/SOGoToolDumpDefaults.m
@@ -67,8 +67,8 @@ - (void) usage
 
 - (NSString *) processDefaults: (BOOL)allDefaults
 {
-  NSUserDefaults *ud;
   NSDictionary *defaultsDict;
+  NSUserDefaults *ud;
   NSData *plistData;
 
   ud = [NSUserDefaults standardUserDefaults];
@@ -83,6 +83,9 @@ - (NSString *) processDefaults: (BOOL)allDefaults
       defaultsDict = [ud persistentDomainForName: @"sogod"];
     }
 
+  if (!defaultsDict)
+    return @"No defaults found. Try to use -f.";
+
   plistData = [NSPropertyListSerialization dataFromPropertyList: (id) defaultsDict
                                          format: NSPropertyListOpenStepFormat
                                errorDescription: 0 ];