diff --git a/src/wallet/wallet.cpp b/src/wallet/wallet.cpp
--- a/src/wallet/wallet.cpp
+++ b/src/wallet/wallet.cpp
@@ -42,9 +42,11 @@
 #include <cassert>
 #include <future>
 
-static std::vector<CWallet *> vpwallets;
+static CCriticalSection cs_wallets;
+static std::vector<CWallet *> vpwallets GUARDED_BY(cs_wallets);
 
 bool AddWallet(CWallet *wallet) {
+    LOCK(cs_wallets);
     assert(wallet);
     std::vector<CWallet *>::const_iterator i =
         std::find(vpwallets.begin(), vpwallets.end(), wallet);
@@ -56,6 +58,7 @@
 }
 
 bool RemoveWallet(CWallet *wallet) {
+    LOCK(cs_wallets);
     assert(wallet);
     std::vector<CWallet *>::iterator i =
         std::find(vpwallets.begin(), vpwallets.end(), wallet);
@@ -67,14 +70,17 @@
 }
 
 bool HasWallets() {
+    LOCK(cs_wallets);
     return !vpwallets.empty();
 }
 
 std::vector<CWallet *> GetWallets() {
+    LOCK(cs_wallets);
     return vpwallets;
 }
 
 CWallet *GetWallet(const std::string &name) {
+    LOCK(cs_wallets);
     for (CWallet *wallet : vpwallets) {
         if (wallet->GetName() == name) {
             return wallet;