diff --git a/src/debug/real-time-logger.cpp b/src/debug/real-time-logger.cpp
index 9bbcd4094cec0fe7763cc1eb22066157079db3b0..9e625bf5867eb51fbe15cc06a78fc0959ece7d4f 100644
--- a/src/debug/real-time-logger.cpp
+++ b/src/debug/real-time-logger.cpp
@@ -26,6 +26,8 @@ namespace dynamicgraph
 {
   RealTimeLogger::RealTimeLogger (const std::size_t& bufferSize)
     : buffer_(bufferSize, NULL)
+    , frontIdx_ (0)
+    , backIdx_ (0)
     , oss_ (NULL)
     , nbDiscarded_ (0)
   {