diff --git a/SC2016.md b/SC2016.md
index 630e023..0d0894c 100644
--- a/SC2016.md
+++ b/SC2016.md
@@ -37,7 +37,7 @@ echo 'PATH=$PATH:/usr/local/bin' >> ~/.bashrc
 ```
 
 ```
-# We also want this variable to output $BASH_SOURCE:$LIN... during an execution trace. 
+# We also want this variable to expand "$BASH_SOURCE:$LINE..." during an execution trace. 
 PS4='+$BASH_SOURCE:$LINENO:$FUNCNAME: '
 ```