diff --git a/xapian-core/api/omdocument.cc b/xapian-core/api/omdocument.cc
index 1134e9fc..62689deb 100644
--- a/xapian-core/api/omdocument.cc
+++ b/xapian-core/api/omdocument.cc
@@ -38,6 +38,7 @@
 #include <xapian/valueiterator.h>
 
 #include <algorithm>
+#include <limits>
 #include <string>
 
 using namespace std;