diff --git a/magick/effect.c b/magick/effect.c
index 49ac136..6901670 100644
--- a/magick/effect.c
+++ b/magick/effect.c
@@ -3178,8 +3178,8 @@
GetMagickPixelPacket(image,&bias);
image_view=AcquireCacheView(image);
blur_view=AcquireCacheView(blur_image);
-#if defined(MAGICKCORE_OPENMP_SUPPORT)
- #pragma omp parallel for schedule(static) shared(progress,status)
+#if defined(MAGICKCORE_OPENMP_SUPPORT) && (_OPENMP > 202001)
+ #pragma omp parallel for schedule(dynamic,4) shared(progress,status)
#endif
for (y=0; y < (long) image->rows; y++)
{
@@ -3262,7 +3262,8 @@
{
(void) GetOneCacheViewVirtualPixel(image_view,x+offset[i].x,y+
offset[i].y,&pixel,exception);
- alpha=(MagickRealType) (QuantumScale*GetAlphaPixelComponent(&pixel));
+ alpha=(MagickRealType) (QuantumScale*
+ GetAlphaPixelComponent(&pixel));
qixel.red+=(*k)*alpha*pixel.red;
qixel.green+=(*k)*alpha*pixel.green;
qixel.blue+=(*k)*alpha*pixel.blue;
@@ -3297,7 +3298,7 @@
MagickBooleanType
proceed;
-#if defined(MAGICKCORE_OPENMP_SUPPORT)
+#if defined(MAGICKCORE_OPENMP_SUPPORT) && (_OPENMP > 202001)
#pragma omp critical (MagickCore_MotionBlurImageChannel)
#endif
proceed=SetImageProgress(image,BlurImageTag,progress++,image->rows);
@@ -5158,8 +5159,8 @@
UndefinedVirtualPixelMethod,MagickTrue,exception);
random_info=AcquireRandomInfoThreadSet();
image_view=AcquireCacheView(spread_image);
-#if defined(MAGICKCORE_OPENMP_SUPPORT)
- #pragma omp parallel for schedule(static) shared(progress,status)
+#if defined(MAGICKCORE_OPENMP_SUPPORT) && (_OPENMP > 202001)
+ #pragma omp parallel for schedule(dynamic,4) shared(progress,status)
#endif
for (y=0; y < (long) spread_image->rows; y++)
{
@@ -5203,7 +5204,7 @@
MagickBooleanType
proceed;
-#if defined(MAGICKCORE_OPENMP_SUPPORT)
+#if defined(MAGICKCORE_OPENMP_SUPPORT) && (_OPENMP > 202001)
#pragma omp critical (MagickCore_SpreadImage)
#endif
proceed=SetImageProgress(image,SpreadImageTag,progress++,image->rows);