diff --git a/modules/features2d/src/blobdetector.cpp b/modules/features2d/src/blobdetector.cpp
index 610569dfa..36aac9014 100644
--- a/modules/features2d/src/blobdetector.cpp
+++ b/modules/features2d/src/blobdetector.cpp
@@ -282,7 +282,7 @@ void SimpleBlobDetector::detectImpl(const cv::Mat& image, std::vector<cv::KeyPoi
     else
         grayscaleImage = image;
 
-    if (grayscaleImage.type != CV_8UC1){
+    if (grayscaleImage.type() != CV_8UC1){
         CV_Error(CV_StsUnsupportedFormat, "Blob detector only supports 8-bit images!");
     }
     vector < vector<Center> > centers;