diff --git a/MagickCore/effect.c b/MagickCore/effect.c
index 59b7ece..af69767 100644
--- a/MagickCore/effect.c
+++ b/MagickCore/effect.c
@@ -2166,7 +2166,7 @@
image_view=AcquireCacheView(image);
blur_view=AcquireCacheView(blur_image);
#if defined(MAGICKCORE_OPENMP_SUPPORT)
- #pragma omp parallel for schedule(static,4) shared(progress,status) omp_throttle(1)
+ #pragma omp parallel for schedule(static,1) shared(progress,status)
#endif
for (y=0; y < (ssize_t) image->rows; y++)
{
@@ -3794,7 +3794,7 @@
image_view=AcquireCacheView(image);
spread_view=AcquireCacheView(spread_image);
#if defined(MAGICKCORE_OPENMP_SUPPORT)
- #pragma omp parallel for schedule(static,4) shared(progress,status) omp_throttle(1)
+ #pragma omp parallel for schedule(static,1) shared(progress,status)
#endif
for (y=0; y < (ssize_t) image->rows; y++)
{