diff --git a/ChangeLog b/ChangeLog
index 076c17cfa..f622531df 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,10 @@
+2008-11-04  Neil Roberts  <neil@linux.intel.com>
+
+	* clutter/cogl/gl/cogl.c (cogl_perspective): Use the accurate
+	64-bit multiplication macro instead of COGL_FIXED_FAST_DIV for
+	calculating xmax as was done previously. This fixes
+	test-perspective and other tests that had a gone a bit skewiff.
+
 2008-11-04  Neil Roberts  <neil@linux.intel.com>
 
 	Bug 1181 - In Score, timelines, appended at markers, are also
diff --git a/clutter/cogl/gl/cogl.c b/clutter/cogl/gl/cogl.c
index e17a8adf9..a77256e78 100644
--- a/clutter/cogl/gl/cogl.c
+++ b/clutter/cogl/gl/cogl.c
@@ -775,7 +775,7 @@ cogl_perspective (CoglFixed fovy,
                     COGL_FIXED_FAST_DIV (cogl_fixed_sin (fovy_rad_half),
                                          cogl_fixed_cos (fovy_rad_half)));
 
-  xmax = COGL_FIXED_FAST_DIV (ymax, aspect);
+  xmax = COGL_FIXED_MUL (ymax, aspect);
 
   x = COGL_FIXED_FAST_DIV (zNear, xmax);
   y = COGL_FIXED_FAST_DIV (zNear, ymax);