diff --git a/ChangeLog b/ChangeLog
index 290e058ad..633e782d0 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,14 @@
+2005-05-16  Keith Packard  <keithp@keithp.com>
+
+	* src/cairo-pattern.c: (_cairo_pattern_shader_init):
+	Initialize op->stops[0].scale = 0.  
+	
+	This scale value is used only when computing gradient values
+	before the defined range, in which case stop 0 is used for both
+	ends of the interpolation, making the value of 'scale' not
+	actually matter, except that valgrind notices we're using
+	an undefined value.
+
 2005-05-16  Carl Worth  <cworth@cworth.org>
 
 	* test/.cvsignore:
diff --git a/src/cairo-pattern.c b/src/cairo-pattern.c
index 524ffa8bf..1746b6b2a 100644
--- a/src/cairo-pattern.c
+++ b/src/cairo-pattern.c
@@ -512,6 +512,13 @@ _cairo_pattern_shader_init (cairo_gradient_pattern_t *pattern,
     qsort (op->stops, pattern->n_stops, sizeof (cairo_shader_color_stop_t),
 	   _cairo_shader_color_stop_compare);
 
+    /* this scale value is used only when computing gradient values
+     * before the defined range, in which case stop 0 is used for both
+     * ends of the interpolation, making the value of 'scale' not
+     * actually matter, except that valgrind notices we're using
+     * an undefined value.
+     */
+    op->stops[0].scale = 0;
     for (i = 0; i < pattern->n_stops - 1; i++)
     {
 	op->stops[i + 1].scale = op->stops[i + 1].offset - op->stops[i].offset;