diff --git a/pljava-so/src/main/c/Function.c b/pljava-so/src/main/c/Function.c
index 249374271..5af233ab7 100644
--- a/pljava-so/src/main/c/Function.c
+++ b/pljava-so/src/main/c/Function.c
@@ -692,6 +692,7 @@ Type Function_checkTypeBaseUDT(Oid typeId, Form_pg_type typeStruct)
 	ereport(ERROR, (errmsg(
 		"PL/Java UDT with oid %u declares input/output/send/recv functions "
 		"in more than one class", typeId)));
+	pg_unreachable(); /* MSVC otherwise is not convinced */
 }
 
 static Function Function_create(