diff --git a/README.rst b/README.rst
index 03317e38..9f5e5433 100644
--- a/README.rst
+++ b/README.rst
@@ -111,6 +111,7 @@ Print a container:
 
 .. code:: c++
 
+    #include <vector>
     #include <fmt/ranges.h>
 
     int main() {