diff --git a/modules/Data_Summarization/Data_Summarization.Rmd b/modules/Data_Summarization/Data_Summarization.Rmd
index 8afe0682..9d564402 100644
--- a/modules/Data_Summarization/Data_Summarization.Rmd
+++ b/modules/Data_Summarization/Data_Summarization.Rmd
@@ -259,7 +259,7 @@ er_grouped %>%
 
 ## Do it in one step: use `%>%` to string these together!
 
-Pipe `CO_heat_ER` into `group_by`, then pipe that into `summarize`:
+Pipe `er` into `group_by`, then pipe that into `summarize`:
 
 ```{r}
 er %>%