diff --git a/gtk-gui.c b/gtk-gui.c
index f241fd313..2b9068681 100644
--- a/gtk-gui.c
+++ b/gtk-gui.c
@@ -1021,6 +1021,13 @@ static void toggle_zoom(GtkWidget *w, gpointer data)
 	repaint_dive();
 }
 
+static void prev_dc(GtkWidget *w, gpointer data)
+{
+	dc_number--;
+	/* If the dc number underflows, we'll "wrap around" and use the last dc */
+	repaint_dive();
+}
+
 static void next_dc(GtkWidget *w, gpointer data)
 {
 	dc_number++;
@@ -1053,7 +1060,8 @@ static GtkActionEntry menu_items[] = {
 	{ "ViewProfile",    NULL, N_("Profile"), CTRLCHAR "2", NULL, G_CALLBACK(view_profile) },
 	{ "ViewInfo",       NULL, N_("Info"), CTRLCHAR "3", NULL, G_CALLBACK(view_info) },
 	{ "ViewThree",      NULL, N_("Three"), CTRLCHAR "4", NULL, G_CALLBACK(view_three) },
-	{ "NextDC",         NULL, N_("Next DC"), CTRLCHAR "C", NULL, G_CALLBACK(next_dc) },
+	{ "PrevDC",         NULL, N_("Prev DC"), NULL, NULL, G_CALLBACK(prev_dc) },
+	{ "NextDC",         NULL, N_("Next DC"), NULL, NULL, G_CALLBACK(next_dc) },
 };
 static gint nmenu_items = sizeof (menu_items) / sizeof (menu_items[0]);
 
@@ -1095,6 +1103,7 @@ static const gchar* ui_string = " \
 					<menuitem name=\"Profile\" action=\"ViewProfile\" /> \
 					<menuitem name=\"Info\" action=\"ViewInfo\" /> \
 					<menuitem name=\"Paned\" action=\"ViewThree\" /> \
+					<menuitem name=\"PrevDC\" action=\"PrevDC\" /> \
 					<menuitem name=\"NextDC\" action=\"NextDC\" /> \
 				</menu> \
 			</menu> \
@@ -1142,6 +1151,12 @@ static gboolean on_key_press(GtkWidget *w, GdkEventKey *event, GtkWidget *diveli
 	case GDK_KEY_Down:
 		select_next_dive();
 		return TRUE;
+	case GDK_KEY_Left:
+		prev_dc(NULL, NULL);
+		return TRUE;
+	case GDK_KEY_Right:
+		next_dc(NULL, NULL);
+		return TRUE;
 	}
 	return FALSE;
 }
diff --git a/profile.c b/profile.c
index 0962f9ca8..dea1ad6ee 100644
--- a/profile.c
+++ b/profile.c
@@ -1800,11 +1800,24 @@ static void plot_set_scale(scale_mode_t scale)
 	}
 }
 
+/* make sure you pass this the FIRST dc - it just walks the list */
+static int nr_dcs(struct divecomputer *main)
+{
+	int i = 1;
+	struct divecomputer *dc = main;
+
+	while ((dc = dc->next) != NULL)
+		i++;
+	return i;
+}
+
 static struct divecomputer *select_dc(struct divecomputer *main)
 {
 	int i = dc_number;
 	struct divecomputer *dc = main;
 
+	while (i < 0)
+		i += nr_dcs(main);
 	do {
 		if (--i < 0)
 			return dc;