diff --git a/docs/content/build-instructions.md b/docs/content/build-instructions.md
index 4e4993360..99f454891 100644
--- a/docs/content/build-instructions.md
+++ b/docs/content/build-instructions.md
@@ -115,7 +115,7 @@ or if you installed LCM to a different, non-standard prefix, you may wish to
 create a `ld.so.conf` file for lcm:
 
 ```shell
-echo $LCM_LIBRARY_DIR > /etc/ld.so.conf.d/lcm.conf
+echo $LCM_LIBRARY_DIR | sudo tee -a /etc/ld.so.conf.d/lcm.conf
 ```
 
 Python users may need to add the lcm install location to Python's site packages