diff --git a/modules/imgproc/src/box_filter.dispatch.cpp b/modules/imgproc/src/box_filter.dispatch.cpp
index 347cdc421e..1d23c72859 100644
--- a/modules/imgproc/src/box_filter.dispatch.cpp
+++ b/modules/imgproc/src/box_filter.dispatch.cpp
@@ -369,6 +369,7 @@ void boxFilter(InputArray _src, OutputArray _dst, int ddepth,
     CV_INSTRUMENT_REGION();
 
     CV_Assert(!_src.empty());
+    CV_Assert(ksize.width > 0 && ksize.height > 0);
 
     CV_OCL_RUN(_dst.isUMat() &&
                (borderType == BORDER_REPLICATE || borderType == BORDER_CONSTANT ||