diff --git a/_episodes/06-rmarkdown-example.md b/_episodes/06-rmarkdown-example.md
index 04b121c7b8f85a9c111095892deb38a57fc744b9..f532be67b3d000d3d56ea00ab32e479e328ee698 100644
--- a/_episodes/06-rmarkdown-example.md
+++ b/_episodes/06-rmarkdown-example.md
@@ -1,4 +1,5 @@
 ---
+source: Rmd
 title: "Using RMarkdown"
 teaching: 10
 exercises: 2
@@ -77,8 +78,7 @@ ggplot(diamonds, aes(x = carat,  y = price, color = cut)) +
 ~~~
 {: .r}
 
-<img src="../fig/rmd-plot-example-1.png" title="plot of chunk plot-example"
-     alt="plot of chunk plot-example" style="display: block; margin: auto;" />
+<img src="../fig/rmd-plot-example-1.png" title="plot of chunk plot-example" alt="plot of chunk plot-example" style="display: block; margin: auto;" />
 
 For the challenges and their solutions, you need to pay attention to where the
 `>` go and where to leave blank lines. You can include code chunks in both the
diff --git a/_episodes_rmd/06-rmarkdown-example.Rmd b/_episodes_rmd/06-rmarkdown-example.Rmd
index b30d7bcf304d257ccf645f3b3449fa5f67dc9ca7..c43503aea6c6b255dea95895a2790765b79faae3 100644
--- a/_episodes_rmd/06-rmarkdown-example.Rmd
+++ b/_episodes_rmd/06-rmarkdown-example.Rmd
@@ -1,4 +1,5 @@
 ---
+source: Rmd
 title: "Using RMarkdown"
 teaching: 10
 exercises: 2