diff --git a/MagickCore/compare.c b/MagickCore/compare.c
index 65848bf63d..bf14373a9d 100644
--- a/MagickCore/compare.c
+++ b/MagickCore/compare.c
@@ -2221,6 +2221,7 @@ MagickExport MagickBooleanType GetImageDistortion(Image *image,
   *distortion=channel_similarity[CompositePixelChannel];
   switch (metric)
   {
+    case DotProductCorrelationErrorMetric:
     case NormalizedCrossCorrelationErrorMetric:
     case StructuralDissimilarityErrorMetric:
     case StructuralSimilarityErrorMetric:
@@ -2398,6 +2399,7 @@ MagickExport double *GetImageDistortions(Image *image,
   distortion=channel_similarity;
   switch (metric)
   {
+    case DotProductCorrelationErrorMetric:
     case NormalizedCrossCorrelationErrorMetric:
     case StructuralDissimilarityErrorMetric:
     case StructuralSimilarityErrorMetric: