diff --git a/plugins/input/gdal/gdal_datasource.cpp b/plugins/input/gdal/gdal_datasource.cpp
index 1ac6557fe..a5a6fc535 100644
--- a/plugins/input/gdal/gdal_datasource.cpp
+++ b/plugins/input/gdal/gdal_datasource.cpp
@@ -32,6 +32,8 @@
 
 #include <gdal_version.h>
 
+#include <mutex>
+
 using mapnik::datasource;
 using mapnik::parameters;
 
diff --git a/plugins/input/ogr/ogr_datasource.cpp b/plugins/input/ogr/ogr_datasource.cpp
index 4c0cb5902..e9433d969 100644
--- a/plugins/input/ogr/ogr_datasource.cpp
+++ b/plugins/input/ogr/ogr_datasource.cpp
@@ -41,6 +41,7 @@
 
 // stl
 #include <fstream>
+#include <mutex>
 #include <sstream>
 #include <stdexcept>