diff --git a/src/shell-integration/README.md b/src/shell-integration/README.md
index 1194ee21b..976cf4924 100644
--- a/src/shell-integration/README.md
+++ b/src/shell-integration/README.md
@@ -73,6 +73,6 @@ sequence occurs.
 
 ```bash
 if [[ -n $GHOSTTY_RESOURCES_DIR ]]; then
-  source $GHOSTTY_RESOURCES_DIR/shell-integration/zsh/ghostty-integration
+  source "$GHOSTTY_RESOURCES_DIR"/shell-integration/zsh/ghostty-integration
 fi
 ```