diff --git a/docs/running-on-yarn.md b/docs/running-on-yarn.md
index 43b06df99d9c7c9af6df2ea28f37953c74d33712..5d8d603aa3e371c2e4a425772a2750eafae65beb 100644
--- a/docs/running-on-yarn.md
+++ b/docs/running-on-yarn.md
@@ -128,7 +128,7 @@ For example:
         --num-executors 3 \
         --driver-memory 4g \
         --executor-memory 2g \
-        --executor-cores 1
+        --executor-cores 1 \
         lib/spark-examples*.jar \
         10