diff --git a/modules/objdetect/include/opencv2/objdetect/aruco_detector.hpp b/modules/objdetect/include/opencv2/objdetect/aruco_detector.hpp
index 281d772db8..2770a23e36 100644
--- a/modules/objdetect/include/opencv2/objdetect/aruco_detector.hpp
+++ b/modules/objdetect/include/opencv2/objdetect/aruco_detector.hpp
@@ -340,7 +340,7 @@ public:
      * using projectPoint function. If not, missing marker projections are interpolated using global
      * homography, and all the marker corners in the board must have the same Z coordinate.
      * @note This function assumes that the board only contains markers from one dictionary, so only the
-     * first configured dictionary is used.
+     * first configured dictionary is used. It has to match the dictionary of the board to work properly.
      */
     CV_WRAP void refineDetectedMarkers(InputArray image, const Board &board,
                                        InputOutputArrayOfArrays detectedCorners,
diff --git a/modules/objdetect/src/aruco/aruco_detector.cpp b/modules/objdetect/src/aruco/aruco_detector.cpp
index 881b627d00..baa8cfc33b 100644
--- a/modules/objdetect/src/aruco/aruco_detector.cpp
+++ b/modules/objdetect/src/aruco/aruco_detector.cpp
@@ -837,7 +837,7 @@ struct ArucoDetector::ArucoDetectorImpl {
             }
 
             // Clean up rejectedImgPoints by comparing to itself and all candidates
-            const float epsilon = 0.000001;
+            const float epsilon = 0.000001f;
             auto compareCandidates = [epsilon](std::vector<Point2f> a, std::vector<Point2f> b) {
                 for (int i = 0; i < 4; i++) {
                     if (std::abs(a[i].x - b[i].x) > epsilon || std::abs(a[i].y - b[i].y) > epsilon) {