diff --git a/src/lib/nfs/FileReader.hxx b/src/lib/nfs/FileReader.hxx
index 7f43e0ecf..424ff766d 100644
--- a/src/lib/nfs/FileReader.hxx
+++ b/src/lib/nfs/FileReader.hxx
@@ -24,6 +24,7 @@
 #include "Lease.hxx"
 #include "Callback.hxx"
 #include "event/DeferredMonitor.hxx"
+#include "Compiler.h"
 
 #include <string>