diff --git a/src/lib/expat/ExpatParser.cxx b/src/lib/expat/ExpatParser.cxx
index 99050f886..6ba599f4c 100644
--- a/src/lib/expat/ExpatParser.cxx
+++ b/src/lib/expat/ExpatParser.cxx
@@ -21,21 +21,9 @@
 #include "ExpatParser.hxx"
 #include "input/InputStream.hxx"
 #include "util/ASCII.hxx"
-#include "util/Error.hxx"
-#include "util/Domain.hxx"
 
 #include <string.h>
 
-static constexpr Domain expat_domain("expat");
-
-void
-ExpatParser::SetError(Error &error)
-{
-	XML_Error code = XML_GetErrorCode(parser);
-	error.Format(expat_domain, int(code), "XML parser failed: %s",
-		     XML_ErrorString(code));
-}
-
 void
 ExpatParser::Parse(const char *data, size_t length, bool is_final)
 {
diff --git a/src/lib/expat/ExpatParser.hxx b/src/lib/expat/ExpatParser.hxx
index c13017fb3..7b5af23b5 100644
--- a/src/lib/expat/ExpatParser.hxx
+++ b/src/lib/expat/ExpatParser.hxx
@@ -75,9 +75,6 @@ public:
 	gcc_pure
 	static const char *GetAttributeCase(const XML_Char **atts,
 					    const char *name);
-
-private:
-	void SetError(Error &error);
 };
 
 /**