diff --git a/src/gcal-date-entry.c b/src/gcal-date-entry.c
index 56835d5a..36d59f6a 100644
--- a/src/gcal-date-entry.c
+++ b/src/gcal-date-entry.c
@@ -27,9 +27,9 @@ struct _GcalDateEntryPrivate
 {
   gboolean  internal_skip;
 
-  guint     day;              /* 1 - 28 || 29 || 30 || 31 */
-  guint     month;            /* 1 - 12 */
-  guint     year;
+  gint      day;              /* 1 - 28 || 29 || 30 || 31 */
+  gint      month;            /* 1 - 12 */
+  gint      year;
 
   gchar    *mask;
   guint     day_pos;
@@ -368,9 +368,9 @@ gcal_date_entry_new (void)
 
 void
 gcal_date_entry_set_date (GcalDateEntry *entry,
-                          guint          day,
-                          guint          month,
-                          guint          year)
+                          gint           day,
+                          gint           month,
+                          gint           year)
 {
   GcalDateEntryPrivate *priv;
 
@@ -386,9 +386,9 @@ gcal_date_entry_set_date (GcalDateEntry *entry,
 
 void
 gcal_date_entry_get_date (GcalDateEntry *entry,
-                          guint         *day,
-                          guint         *month,
-                          guint         *year)
+                          gint          *day,
+                          gint          *month,
+                          gint          *year)
 {
   GcalDateEntryPrivate *priv;
 
diff --git a/src/gcal-date-entry.h b/src/gcal-date-entry.h
index 38ba7060..a59e17b5 100644
--- a/src/gcal-date-entry.h
+++ b/src/gcal-date-entry.h
@@ -55,14 +55,14 @@ GType            gcal_date_entry_get_type        (void);
 GtkWidget*       gcal_date_entry_new             (void);
 
 void             gcal_date_entry_set_date        (GcalDateEntry *entry,
-                                                  guint          day,
-                                                  guint          month,
-                                                  guint          year);
+                                                  gint           day,
+                                                  gint           month,
+                                                  gint           year);
 
 void             gcal_date_entry_get_date        (GcalDateEntry *entry,
-                                                  guint         *day,
-                                                  guint         *month,
-                                                  guint         *year);
+                                                  gint          *day,
+                                                  gint          *month,
+                                                  gint          *year);
 
 G_END_DECLS
 
diff --git a/src/gcal-time-entry.c b/src/gcal-time-entry.c
index 5bd2e8aa..de1aed26 100644
--- a/src/gcal-time-entry.c
+++ b/src/gcal-time-entry.c
@@ -25,8 +25,8 @@ struct _GcalTimeEntryPrivate
 {
   gboolean internal_delete;
 
-  guint    hours;
-  guint    minutes;
+  gint    hours;
+  gint    minutes;
 };
 
 static void     gtk_editable_iface_init                        (GtkEditableInterface *iface);
@@ -292,9 +292,9 @@ gcal_time_entry_insert_text (GtkEditable *editable,
 
   /* setting hours, minutes */
   hours_text = g_strdup_printf ("%.2s", old_text);
-  priv->hours = (guint) g_ascii_strtoull (hours_text, NULL, 10);
+  priv->hours = (gint) g_ascii_strtoull (hours_text, NULL, 10);
   g_free (hours_text);
-  priv->minutes = (guint) g_ascii_strtoull (old_text + 3, NULL, 10);
+  priv->minutes = (gint) g_ascii_strtoull (old_text + 3, NULL, 10);
 
   priv->internal_delete = TRUE;
   gtk_editable_delete_text (editable, 0, 5);
@@ -322,8 +322,8 @@ gcal_time_entry_new (void)
 
 void
 gcal_time_entry_set_time (GcalTimeEntry *entry,
-                          guint          hours,
-                          guint          minutes)
+                          gint           hours,
+                          gint           minutes)
 {
   GcalTimeEntryPrivate *priv;
   gchar *new_time;
@@ -343,8 +343,8 @@ gcal_time_entry_set_time (GcalTimeEntry *entry,
 
 void
 gcal_time_entry_get_time (GcalTimeEntry *entry,
-                          guint         *hours,
-                          guint         *minutes)
+                          gint          *hours,
+                          gint          *minutes)
 {
   GcalTimeEntryPrivate *priv;
 
diff --git a/src/gcal-time-entry.h b/src/gcal-time-entry.h
index afc20c09..40c382c0 100644
--- a/src/gcal-time-entry.h
+++ b/src/gcal-time-entry.h
@@ -53,12 +53,12 @@ GType            gcal_time_entry_get_type        (void);
 GtkWidget*       gcal_time_entry_new             (void);
 
 void             gcal_time_entry_set_time        (GcalTimeEntry *entry,
-                                                  guint          hours,
-                                                  guint          minutes);
+                                                  gint           hours,
+                                                  gint           minutes);
 
 void             gcal_time_entry_get_time        (GcalTimeEntry *entry,
-                                                  guint         *hours,
-                                                  guint         *minutes);
+                                                  gint          *hours,
+                                                  gint          *minutes);
 
 G_END_DECLS