diff --git a/src/dft/initBoundaryConditions.cc b/src/dft/initBoundaryConditions.cc
index aa9003b9a..f9e5825ce 100644
--- a/src/dft/initBoundaryConditions.cc
+++ b/src/dft/initBoundaryConditions.cc
@@ -406,7 +406,8 @@ namespace dftfe
           std::min(d_dftParamsPtr->chebyWfcBlockSize, d_numEigenValues);
 
         d_basisOperationsPtrDevice->createScratchMultiVectors(1, 3);
-        d_basisOperationsPtrDevice->createScratchMultiVectors(BVec, 2);
+        d_basisOperationsPtrDevice->createScratchMultiVectors(
+          BVec, d_dftParamsPtr->overlapComputeCommunCheby ? 4 : 2);
       }
 #endif