diff --git a/modules/calib3d/src/chessboard.cpp b/modules/calib3d/src/chessboard.cpp
index bded912985..b4a8d9dd50 100644
--- a/modules/calib3d/src/chessboard.cpp
+++ b/modules/calib3d/src/chessboard.cpp
@@ -3720,10 +3720,11 @@ Chessboard::Board Chessboard::detectImpl(const Mat& gray,std::vector<cv::Mat> &f
                     continue;
                 }
 
+                iter_boards->normalizeOrientation(false);
+
                 if(iter_boards->getSize() == parameters.chessboard_size ||
                         iter_boards->getSize() == chessboard_size2)
                 {
-                    iter_boards->normalizeOrientation(false);
                     if(iter_boards->getSize() != parameters.chessboard_size)
                     {
                         if(iter_boards->isCellBlack(0,0) == iter_boards->isCellBlack(0,int(iter_boards->colCount())-1))
diff --git a/modules/calib3d/test/test_chesscorners.cpp b/modules/calib3d/test/test_chesscorners.cpp
index 3d13602780..f391e42e6a 100644
--- a/modules/calib3d/test/test_chesscorners.cpp
+++ b/modules/calib3d/test/test_chesscorners.cpp
@@ -849,5 +849,18 @@ TEST(Calib3d_RotatedCirclesPatternDetector, issue_24964)
     EXPECT_LE(error, precise_success_error_level);
 }
 
+TEST(Calib3d_CornerOrdering, issue_26830) {
+    const cv::String dataDir = string(TS::ptr()->get_data_path()) + "cv/cameracalibration/";
+    const cv::Mat image = cv::imread(dataDir + "checkerboard_marker_white.png");
+
+    std::vector<Point2f> cornersMinimumSizeMatchesPatternSize;
+    ASSERT_TRUE(cv::findChessboardCornersSB(image, Size(14, 9), cornersMinimumSizeMatchesPatternSize, CALIB_CB_MARKER | CALIB_CB_LARGER));
+
+    std::vector<Point2f> cornersMinimumSizeSmallerThanPatternSize;
+    ASSERT_TRUE(cv::findChessboardCornersSB(image, Size(4, 4), cornersMinimumSizeSmallerThanPatternSize, CALIB_CB_MARKER | CALIB_CB_LARGER));
+
+    ASSERT_EQ(cornersMinimumSizeMatchesPatternSize, cornersMinimumSizeSmallerThanPatternSize);
+}
+
 }} // namespace
 /* End of file. */