diff --git a/MagickCore/statistic.h b/MagickCore/statistic.h
index 1a39b65..2dd70b6 100644
--- a/MagickCore/statistic.h
+++ b/MagickCore/statistic.h
@@ -105,6 +105,7 @@
 
 extern MagickExport Image
   *EvaluateImages(const Image *,const MagickEvaluateOperator,ExceptionInfo *),
+  *PolynomialImage(const Image *,const size_t,const double *,ExceptionInfo *),
   *StatisticImage(const Image *,const StatisticType,const size_t,const size_t,
     ExceptionInfo *);