diff --git a/qt-ui/subsurfacewebservices.cpp b/qt-ui/subsurfacewebservices.cpp
index 69dd7e1cd..8dd6b5921 100644
--- a/qt-ui/subsurfacewebservices.cpp
+++ b/qt-ui/subsurfacewebservices.cpp
@@ -4,6 +4,7 @@
 
 #include <libxml/parser.h>
 #include <zip.h>
+#include <errno.h>
 
 #include <QDir>
 #include <QHttpMultiPart>