diff --git a/docs/manual/src/asciidoc/index.adoc b/docs/manual/src/asciidoc/index.adoc
index d908239dfc..a801a07c7e 100644
--- a/docs/manual/src/asciidoc/index.adoc
+++ b/docs/manual/src/asciidoc/index.adoc
@@ -1451,7 +1451,7 @@ The filters, aliases and namespace elements/attributes which create the filters
 | `http/x509`
 
 |  PRE_AUTH_FILTER
-| `AstractPreAuthenticatedProcessingFilter` Subclasses
+| `AbstractPreAuthenticatedProcessingFilter` Subclasses
 | N/A
 
 |  CAS_FILTER