diff --git a/doc/config.html b/doc/config.html
index 9499583c..9307e6db 100755
--- a/doc/config.html
+++ b/doc/config.html
@@ -596,6 +596,13 @@ are set accordingly. The "Last xxx" page uses this setting directly.
 Number of logbook entries displayed per page in a search result. The default is 20.
 <p>
 
+<li><b><code>Restrict edit time = &lt;hours&gt;</code></b>
+<br>
+If this option is set, a new message can only be edited a certain number of hours
+after its creation. This can be useful if one wants to ensure that old entries
+cannot be modified. Hours can also be fractional, like 0.5 for 30 min.
+<p>
+
 </UL>
 
 <a name="attrib"><hr>
diff --git a/src/elogd.c b/src/elogd.c
index 53d27d6d..85bfda6e 100755
--- a/src/elogd.c
+++ b/src/elogd.c
@@ -6,6 +6,9 @@
   Contents:     Web server program for Electronic Logbook ELOG
 
   $Log$
+  Revision 1.155  2003/11/20 13:37:20  midas
+  Added 'restrict edit time'
+
   Revision 1.154  2003/11/19 14:11:38  midas
   Added MAX_REPLY_TO
 
@@ -5251,6 +5254,21 @@ char   fl[8][NAME_LENGTH];
       }
     }
 
+  /* check for editing interval */
+  if (bedit && getcfg(lbs->name, "Restrict edit time", str))
+    {
+    for (i = 0 ; i < *lbs->n_el_index ; i++)
+      if (lbs->el_index[i].message_id == message_id)
+        break;
+
+    if (i < *lbs->n_el_index && time(NULL) > lbs->el_index[i].file_time + atof(str)*3600)
+      {
+      sprintf(str, loc("Message can only be edited %1.2lg hours after creation"), atof(str));
+      show_error(str);
+      return;
+      }
+    }
+
   /* remove attributes for replies */
   if (breply)
     {