diff --git a/ixwebsocket/IXSocketOpenSSL.cpp b/ixwebsocket/IXSocketOpenSSL.cpp
index 2a14ef6d..a3e6906c 100644
--- a/ixwebsocket/IXSocketOpenSSL.cpp
+++ b/ixwebsocket/IXSocketOpenSSL.cpp
@@ -86,8 +86,7 @@ namespace ix
 
     std::atomic<bool> SocketOpenSSL::_openSSLInitializationSuccessful(false);
     std::once_flag SocketOpenSSL::_openSSLInitFlag;
-    std::unique_ptr<std::mutex[]> SocketOpenSSL::_openSSLMutexes =
-        ix::make_unique<std::mutex[]>(CRYPTO_num_locks());
+    std::array<std::mutex[], CRYPTO_num_locks()> openSSLMutexes;
 
     SocketOpenSSL::SocketOpenSSL(const SocketTLSOptions& tlsOptions, int fd)
         : Socket(fd)
@@ -129,11 +128,11 @@ namespace ix
     {
         if (mode & CRYPTO_LOCK)
         {
-            _openSSLMutexes[type].lock();
+            openSSLMutexes[type].lock();
         }
         else
         {
-            _openSSLMutexes[type].unlock();
+            openSSLMutexes[type].unlock();
         }
     }
 
diff --git a/ixwebsocket/IXSocketOpenSSL.h b/ixwebsocket/IXSocketOpenSSL.h
index 92d9935a..dea1ffd6 100644
--- a/ixwebsocket/IXSocketOpenSSL.h
+++ b/ixwebsocket/IXSocketOpenSSL.h
@@ -61,7 +61,6 @@ namespace ix
 
         static std::once_flag _openSSLInitFlag;
         static std::atomic<bool> _openSSLInitializationSuccessful;
-        static std::unique_ptr<std::mutex[]> _openSSLMutexes;
     };
 
 } // namespace ix