diff --git a/Modules/IO/IOGDAL/src/otbGDALOverviewsBuilder.cxx b/Modules/IO/IOGDAL/src/otbGDALOverviewsBuilder.cxx
index ee3d3e72e8f4f28cc8a674ab7537cd90fff07553..7b6608c87e6db4af91dffa56e6d81006fa1ad5b5 100644
--- a/Modules/IO/IOGDAL/src/otbGDALOverviewsBuilder.cxx
+++ b/Modules/IO/IOGDAL/src/otbGDALOverviewsBuilder.cxx
@@ -30,6 +30,7 @@
 #include "otbGDALImageIO.h"
 #include "otbSystem.h"
 
+#include <cctype>
 
 namespace otb
 {