diff --git a/modules/cudaarithm/src/cuda/threshold.cu b/modules/cudaarithm/src/cuda/threshold.cu
index c5586e61ab..6199081ba9 100644
--- a/modules/cudaarithm/src/cuda/threshold.cu
+++ b/modules/cudaarithm/src/cuda/threshold.cu
@@ -178,7 +178,7 @@ otsu_score(uint *otsu_threshold, uint *threshold_sums, float2 *variance)
 {
     const uint32_t n_thresholds = 256;
 
-    __shared__ float shared_memory[n_thresholds / WARP_SIZE];
+    __shared__ float shared_memory[n_thresholds];
 
     int threshold = threadIdx.x;