diff --git a/src/utils/inc/brainflow_array.h b/src/utils/inc/brainflow_array.h
index 559145cba..5dba6e732 100644
--- a/src/utils/inc/brainflow_array.h
+++ b/src/utils/inc/brainflow_array.h
@@ -448,9 +448,9 @@ class BrainFlowArray
     }
 
     /// fill already preallocated buffer
-    void fill (T *ptr, int size)
+    void fill (T *ptr, int num)
     {
-        memcpy (origin, ptr, sizeof (T) * size);
+        memcpy (origin, ptr, sizeof (T) * num);
     }
 };