diff --git a/src/main.h b/src/main.h
index f47c9ee82..6f39b6e89 100644
--- a/src/main.h
+++ b/src/main.h
@@ -102,7 +102,6 @@ extern unsigned int nCoinCacheSize;
 static const uint64_t nMinDiskSpace = 52428800;
 
 
-class CCoinsDB;
 class CBlockTreeDB;
 struct CDiskBlockPos;
 class CTxUndo;