diff --git a/src/USER-MISC/compute_gyration_shape_chunk.cpp b/src/USER-MISC/compute_gyration_shape_chunk.cpp
index b493455ebf..116d851024 100644
--- a/src/USER-MISC/compute_gyration_shape_chunk.cpp
+++ b/src/USER-MISC/compute_gyration_shape_chunk.cpp
@@ -178,6 +178,7 @@ void ComputeGyrationShapeChunk::allocate()
   former_nchunks = current_nchunks;
   memory->create(shape_parameters,current_nchunks,6,"gyration/shape/chunk:shape_parameters");
   array = shape_parameters;
+  size_array_rows = current_nchunks;
 }
 
 /* ----------------------------------------------------------------------