diff --git a/modules/features2d/src/fast.cpp b/modules/features2d/src/fast.cpp
index beca7d6ec..92059dc2d 100644
--- a/modules/features2d/src/fast.cpp
+++ b/modules/features2d/src/fast.cpp
@@ -332,7 +332,7 @@ void FAST(InputArray _img, std::vector<KeyPoint>& keypoints, int threshold, bool
 {
   if( ocl::useOpenCL() && _img.isUMat() && type == FastFeatureDetector::TYPE_9_16 &&
       ocl_FAST(_img, keypoints, threshold, nonmax_suppression, 10000))
-      ;
+      return;
 
   switch(type) {
     case FastFeatureDetector::TYPE_5_8: