diff --git a/MagickCore/cache.c b/MagickCore/cache.c
index 93de807..fa4600d 100644
--- a/MagickCore/cache.c
+++ b/MagickCore/cache.c
@@ -4898,7 +4898,7 @@
   image_view=AcquireVirtualCacheView(image,exception);  /* must be virtual */
 #if defined(MAGICKCORE_OPENMP_SUPPORT)
   #pragma omp parallel for schedule(static) shared(status) \
-    dynamic_num_threads_dos(image->columns,image->rows)
+    dynamic_number_threads(image->columns,image->rows,1)
 #endif
   for (y=0; y < (ssize_t) image->rows; y++)
   {