diff --git a/clutter/clutter/clutter-blur.c b/clutter/clutter/clutter-blur.c
index 9a8153e8f..abc8d3c14 100644
--- a/clutter/clutter/clutter-blur.c
+++ b/clutter/clutter/clutter-blur.c
@@ -86,7 +86,7 @@ static const char *gaussian_blur_glsl =
 "                                                                          \n"
 "  int n_steps = int (ceil (3 * sigma));                                   \n"
 "                                                                          \n"
-"  for (int i = 1; i < n_steps; i += 2) {                                  \n"
+"  for (int i = 1; i <= n_steps; i += 2) {                                 \n"
 "    float coefficient_subtotal = gauss_coefficient.x;                     \n"
 "    gauss_coefficient.xy *= gauss_coefficient.yz;                         \n"
 "    coefficient_subtotal += gauss_coefficient.x;                          \n"