diff --git a/utils/mapnik-index/process_geojson_file.cpp b/utils/mapnik-index/process_geojson_file.cpp
index 5200a0a4a..ed9adc35a 100644
--- a/utils/mapnik-index/process_geojson_file.cpp
+++ b/utils/mapnik-index/process_geojson_file.cpp
@@ -26,6 +26,7 @@
 #include <mapnik/geometry_adapters.hpp>
 #pragma GCC diagnostic push
 #pragma GCC diagnostic ignored "-Wshadow"
+#pragma GCC diagnostic ignored "-Wsign-compare"
 #pragma GCC diagnostic ignored "-Wsign-conversion"
 #include <boost/interprocess/mapped_region.hpp>
 #include <boost/interprocess/streams/bufferstream.hpp>