diff --git a/horizon/utils/secret_key.py b/horizon/utils/secret_key.py
index 4661521b79..c2db4e8486 100644
--- a/horizon/utils/secret_key.py
+++ b/horizon/utils/secret_key.py
@@ -46,7 +46,9 @@ def generate_key(key_length=64):
 
 def read_from_file(key_file='.secret_key'):
     if (os.stat(key_file).st_mode & 0o777) != 0o600:
-        raise FilePermissionError("Insecure key file permissions!")
+        raise FilePermissionError(
+            "Insecure permissions on key file %s, should be 0600." %
+            os.path.abspath(key_file))
     with open(key_file, 'r') as f:
         key = f.readline()
         return key