diff --git a/swad_changelog.h b/swad_changelog.h
index 62aa777c3..61e108d62 100644
--- a/swad_changelog.h
+++ b/swad_changelog.h
@@ -111,11 +111,12 @@
 /****************************** Public constants *****************************/
 /*****************************************************************************/
 
-#define Log_PLATFORM_VERSION	"SWAD 15.42.3 (2015/11/21)"
+#define Log_PLATFORM_VERSION	"SWAD 15.42.4 (2015/11/21)"
 
 // Number of lines (includes comments but not blank lines) has been got with the following command:
 // nl swad*.c swad*.h css/swad*.css py/swad*.py js/swad*.js soap/swad*.h sql/swad*.sql | tail -1
 /*
+        Version 15.42.4:  Nov 21, 2015	Fixed bug when getting first day of week from IP preferences. (187535 lines)
         Version 15.42.3:  Nov 21, 2015	Stats of hits distributed by week depend on user's preference about first day of the week. (187528 lines)
         Version 15.42.2:  Nov 21, 2015	Fixed bug in JavaScript code to draw months. (187524 lines)
         Version 15.42.1:  Nov 21, 2015	Calendar is drawn depending on user's preference about first day of the week. (187523 lines)
diff --git a/swad_preference.c b/swad_preference.c
index 9117c7441..783f7bd54 100644
--- a/swad_preference.c
+++ b/swad_preference.c
@@ -125,6 +125,7 @@ void Pre_EditPrefs (void)
 
 void Pre_GetPrefsFromIP (void)
   {
+   extern const bool Cal_DayIsValidAsFirstDayOfWeek[7];
    char Query[1024];
    unsigned long NumRows;
    MYSQL_RES *mysql_res;
@@ -134,7 +135,7 @@ void Pre_GetPrefsFromIP (void)
    if (Gbl.IP[0])
      {
       /***** Get preferences from database *****/
-      sprintf (Query,"SELECT Layout,Theme,IconSet,Menu,SideCols"
+      sprintf (Query,"SELECT FirstDayOfWeek,Layout,Theme,IconSet,Menu,SideCols"
 		     " FROM IP_prefs WHERE IP='%s'",
 	       Gbl.IP);
       if ((NumRows = DB_QuerySELECT (Query,&mysql_res,"can not get preferences")))
@@ -145,26 +146,32 @@ void Pre_GetPrefsFromIP (void)
 	 /***** Get preferences from database *****/
 	 row = mysql_fetch_row (mysql_res);
 
-	 /* Get layout (row[0]) */
-	 Gbl.Prefs.Layout = Lay_LAYOUT_DEFAULT;
+	 /* Get first day of week (row[0]) */
+	 Gbl.Prefs.FirstDayOfWeek = Cal_FIRST_DAY_OF_WEEK_DEFAULT;
 	 if (sscanf (row[0],"%u",&UnsignedNum) == 1)
+	    if (Cal_DayIsValidAsFirstDayOfWeek[UnsignedNum])
+	       Gbl.Prefs.FirstDayOfWeek = UnsignedNum;
+
+	 /* Get layout (row[1]) */
+	 Gbl.Prefs.Layout = Lay_LAYOUT_DEFAULT;
+	 if (sscanf (row[1],"%u",&UnsignedNum) == 1)
 	    if (UnsignedNum < Lay_NUM_LAYOUTS)
 	       Gbl.Prefs.Layout = (Lay_Layout_t) UnsignedNum;
 
-	 /* Get theme (row[1]) */
-	 Gbl.Prefs.Theme = The_GetThemeFromStr (row[1]);
+	 /* Get theme (row[2]) */
+	 Gbl.Prefs.Theme = The_GetThemeFromStr (row[2]);
 
-	 /* Get icon set (row[2]) */
-	 Gbl.Prefs.IconSet = Ico_GetIconSetFromStr (row[2]);
+	 /* Get icon set (row[3]) */
+	 Gbl.Prefs.IconSet = Ico_GetIconSetFromStr (row[3]);
 
-	 /* Get menu (row[3]) */
+	 /* Get menu (row[4]) */
 	 Gbl.Prefs.Menu = Mnu_MENU_DEFAULT;
-	 if (sscanf (row[3],"%u",&UnsignedNum) == 1)
+	 if (sscanf (row[4],"%u",&UnsignedNum) == 1)
 	    if (UnsignedNum < Mnu_NUM_MENUS)
 	       Gbl.Prefs.Menu = (Lay_Layout_t) UnsignedNum;
 
-	 /* Get if user wants to show side columns (row[4]) */
-	 if (sscanf (row[4],"%u",&Gbl.Prefs.SideCols) == 1)
+	 /* Get if user wants to show side columns (row[5]) */
+	 if (sscanf (row[5],"%u",&Gbl.Prefs.SideCols) == 1)
 	   {
 	    if (Gbl.Prefs.SideCols > Lay_SHOW_BOTH_COLUMNS)
 	       Gbl.Prefs.SideCols = Cfg_DEFAULT_COLUMNS;