1 files changed, 4 insertions, 0 deletions
diff --git a/src/modules/AuthBackendChallengeResponse/AuthBackendChallengeResponse.cpp b/src/modules/AuthBackendChallengeResponse/AuthBackendChallengeResponse.cpp
index 5878362..fc6bd47 100644
--- a/src/modules/AuthBackendChallengeResponse/AuthBackendChallengeResponse.cpp
+++ b/src/modules/AuthBackendChallengeResponse/AuthBackendChallengeResponse.cpp
@@ -21,6 +21,8 @@
 
 #include <Common/Hash.h>
 
+#include <boost/thread/locks.hpp>
+
 namespace Mad {
 namespace Modules {
 namespace AuthBackendChallengeResponse {
@@ -30,6 +32,8 @@ const std::string AuthBackendChallengeResponse::methodName = "Challenge-Response
 AuthBackendChallengeResponse::AuthContextChallengeResponse::AuthContextChallengeResponse(AuthBackendChallengeResponse *backend) : authenticated(false) {
   challenge.reserve(32);
 
+  boost::lock_guard<boost::mutex> lock(backend->mutex);
+
   for(int i = 0; i < 32; ++i)
     challenge.push_back(backend->randomGenerator());
 }