Index: graphics/darktable/Makefile
===================================================================
--- graphics/darktable/Makefile
+++ graphics/darktable/Makefile
@@ -3,6 +3,7 @@
 
 PORTNAME=	darktable
 PORTVERSION=	1.6.4
+PORTREVISION=	1
 CATEGORIES=	graphics
 MASTER_SITES=	https://github.com/darktable-org/${PORTNAME}/releases/download/release-${PORTVERSION}/
 
Index: graphics/darktable/files/patch-tools_generate__prefs.xsl
===================================================================
--- /dev/null
+++ graphics/darktable/files/patch-tools_generate__prefs.xsl
@@ -0,0 +1,13 @@
+--- tools/generate_prefs.xsl.orig	2015-04-03 13:59:08 UTC
++++ tools/generate_prefs.xsl
+@@ -231,7 +231,9 @@
+ 		<xsl:text>    gint min = 0;&#xA;    gint max = G_MAXINT;&#xA;</xsl:text>
+ 		<xsl:apply-templates select="type" mode="range"/>
+ 		<xsl:text>  </xsl:text><xsl:apply-templates select="type" mode="factor"/>
+-		<xsl:text>    min *= factor; max *= factor;
++		<xsl:text>    double tmp;
++    tmp = min * (double)factor; min = tmp;
++    tmp = max * (double)factor; max = tmp;
+     widget = gtk_spin_button_new_with_range(min, max, 1);
+     gtk_spin_button_set_digits(GTK_SPIN_BUTTON(widget), 0);
+     gtk_spin_button_set_value(GTK_SPIN_BUTTON(widget), dt_conf_get_int("</xsl:text><xsl:value-of select="name"/><xsl:text>") * factor);