diff --git a/R/sigmaAttrs.R b/R/sigmaAttrs.R
index 69dda5f..db81ece 100644
--- a/R/sigmaAttrs.R
+++ b/R/sigmaAttrs.R
@@ -121,8 +121,8 @@ addNodeSize <- function(sigmaObj, minSize = 1, maxSize = 3, sizeMetric = 'degree
     sigmaObj$x$options$minNodeSize <- minSize
     sigmaObj$x$options$maxNodeSize <- maxSize
   } else{
-    tmp_graph <- igraph::graph_from_data_frame(sigmaObj$x$graph$edges,
-                                               directed = FALSE)
+    tmp_graph <- igraph::graph_from_edgelist(as.matrix(edges[,1:2]),
+                                             directed = FALSE)
     if(sizeMetric == 'degree'){
       nodes$size <- igraph::degree(tmp_graph)
     } else if(sizeMetric == 'closeness'){