diff --git a/README.md b/README.md
index c8da2c2..2111343 100644
--- a/README.md
+++ b/README.md
@@ -124,7 +124,7 @@ reverse_array() {
     # Usage: reverse_array "array"
     #        reverse_array 1 2 3 4 5 6
     shopt -s extdebug
-    f()(printf "%s " "${BASH_ARGV[@]}"); f "$@"
+    f()(printf '%s ' "${BASH_ARGV[@]}"); f "$@"
     shopt -u extdebug
 
     printf '\n'