diff --git a/Userland/Libraries/LibXML/Parser/Parser.h b/Userland/Libraries/LibXML/Parser/Parser.h
index bcfcefc233..fc6f39714b 100644
--- a/Userland/Libraries/LibXML/Parser/Parser.h
+++ b/Userland/Libraries/LibXML/Parser/Parser.h
@@ -83,7 +83,6 @@ private:
         Content,
     };
     ErrorOr<DeprecatedString, ParseError> resolve_reference(EntityReference const&, ReferencePlacement);
-    ErrorOr<DeprecatedString, ParseError> resolve_parameter_entity_reference(EntityReference const&);
 
     enum class Required {
         No,