diff --git a/src/rpcdump.cpp b/src/rpcdump.cpp
index c1dccb87a..c8326fe82 100644
--- a/src/rpcdump.cpp
+++ b/src/rpcdump.cpp
@@ -213,6 +213,9 @@ Value importwallet(const Array& params, bool fHelp)
     while (pindex && pindex->pprev && pindex->nTime > nTimeBegin - 7200)
         pindex = pindex->pprev;
 
+    if (!pwalletMain->nTimeFirstKey || nTimeBegin < pwalletMain->nTimeFirstKey)
+        pwalletMain->nTimeFirstKey = nTimeBegin;
+
     LogPrintf("Rescanning last %i blocks\n", chainActive.Height() - pindex->nHeight + 1);
     pwalletMain->ScanForWalletTransactions(pindex);
     pwalletMain->MarkDirty();