diff --git a/src/main.h b/src/main.h
index 6657dd6be..95d58fcbb 100644
--- a/src/main.h
+++ b/src/main.h
@@ -204,6 +204,7 @@ extern bool fReindex;
 extern bool fVerifyChain;
 extern int nScriptCheckThreads;
 extern bool fTxIndex;
+extern bool fNftIndex;
 extern bool fAddressIndex;
 extern bool fSpentIndex;
 extern bool fTimestampIndex;