diff --git a/doc/reference/preprocessing-spec.rst b/doc/reference/preprocessing-spec.rst
index d47de3eb662..def7a9c354b 100644
--- a/doc/reference/preprocessing-spec.rst
+++ b/doc/reference/preprocessing-spec.rst
@@ -3,7 +3,7 @@
 Preprocessing Specification
 ===========================
 
-Some stanzas including ``(library)`` accept a ``(preprocessing)`` field. The
+Some stanzas including ``(library)`` accept a ``(preprocess)`` field. The
 possible values for its argument are:
 
 .. productionlist::