diff --git a/MagickCore/effect.c b/MagickCore/effect.c
index 58b270c..7321386 100644
--- a/MagickCore/effect.c
+++ b/MagickCore/effect.c
@@ -3032,7 +3032,7 @@
image_view=AcquireVirtualCacheView(image,exception);
luminance_view=AcquireVirtualCacheView(luminance_image,exception);
blur_view=AcquireAuthenticCacheView(blur_image,exception);
-#if defined(MMAGICKCORE_OPENMP_SUPPORT)
+#if defined(MAGICKCORE_OPENMP_SUPPORT)
#pragma omp parallel for schedule(static,4) shared(progress,status) \
dynamic_number_threads(image,image->columns,image->rows,1)
#endif
