diff --git a/MagickCore/effect.c b/MagickCore/effect.c
index 20fbc4c..546e525 100644
--- a/MagickCore/effect.c
+++ b/MagickCore/effect.c
@@ -1304,7 +1304,7 @@
image_view=AcquireCacheView(image);
convolve_view=AcquireCacheView(convolve_image);
#if defined(MAGICKCORE_OPENMP_SUPPORT)
- #pragma omp parallel for schedule(guided) shared(progress,status)
+ #pragma omp parallel for schedule(static,4) shared(progress,status)
#endif
for (y=0; y < (ssize_t) image->rows; y++)
{
@@ -1485,7 +1485,7 @@
q=g+(columns+2);
r=p+(y_offset*(columns+2)+x_offset);
#if defined(MAGICKCORE_OPENMP_SUPPORT)
- #pragma omp parallel for schedule(guided)
+ #pragma omp parallel for schedule(static,4)
#endif
for (y=0; y < (ssize_t) rows; y++)
{
@@ -1521,7 +1521,7 @@
r=q+(y_offset*(columns+2)+x_offset);
s=q-(y_offset*(columns+2)+x_offset);
#if defined(MAGICKCORE_OPENMP_SUPPORT)
- #pragma omp parallel for schedule(guided)
+ #pragma omp parallel for schedule(static,4)
#endif
for (y=0; y < (ssize_t) rows; y++)
{