diff --git a/NEWS.md b/NEWS.md
index e3f77d8..2f661fd 100644
--- a/NEWS.md
+++ b/NEWS.md
@@ -6,6 +6,8 @@
 
 * Initialization in rollup_radii_of_gyration_unc() cleaned up (#44).
 
+* igraph loading fix for vignette (#48).
+
 # massProps 0.3.1
 
 * Examples made smaller to avoid CRAN runtime violations
diff --git a/vignettes/massProps.Rmd b/vignettes/massProps.Rmd
index 948a60e..d9e7b54 100644
--- a/vignettes/massProps.Rmd
+++ b/vignettes/massProps.Rmd
@@ -152,7 +152,11 @@ test_table
 
 Suppose we also have this tree:
 
+```{r echo = FALSE}
+suppressPackageStartupMessages({library(igraph)})
+```
 ```{r}
+library(igraph)
 test_tree
 ```