diff --git a/src/wallet/wallet.cpp b/src/wallet/wallet.cpp
index 7f694fc5b..525b2b5e6 100644
--- a/src/wallet/wallet.cpp
+++ b/src/wallet/wallet.cpp
@@ -786,7 +786,7 @@ void CWallet::DecrementNoteWitnesses(const CBlockIndex* pindex)
             }
         }
         fprintf(stderr,"decrement witness cache -> %d\n",(int32_t)nWitnessCacheSize);
-        if ( nWitnessCacheSize > 0 )
+        if ( nWitnessCacheSize > 1 )
             nWitnessCacheSize -= 1;
         else
         {