diff --git a/output-gazetteer.cpp b/output-gazetteer.cpp
index cecca4508..7b0e11047 100644
--- a/output-gazetteer.cpp
+++ b/output-gazetteer.cpp
@@ -11,6 +11,7 @@
 #include "util.hpp"
 
 #include <algorithm>
+#include <iostream>
 #include <memory>
 
 #define SRID (reproj->project_getprojinfo()->srs)