diff --git a/src/tools/pgindent/README b/src/tools/pgindent/README
index 8a2befdd035d657f6ce0f3975e36197bdd96e3fc..3d3a253c0ee3bcca29c6c1f31c191dc378684eca 100644
--- a/src/tools/pgindent/README
+++ b/src/tools/pgindent/README
@@ -82,7 +82,7 @@ Notes about excluded files
 --------------------------
 
 src/include/storage/s_lock.h and src/include/port/atomics/ are excluded
-because they contains assembly code that pgindent tends to mess up.
+because they contain assembly code that pgindent tends to mess up.
 
 src/include/snowball/libstemmer/ and src/backend/snowball/libstemmer/
 are excluded because those files are imported from an external project,