diff --git a/reading_machine/include/Config.hpp b/reading_machine/include/Config.hpp
index db8eb10730aae55c4e9d181d7829509f062771b3..78f7834babfca378084ea94773bd3d667ae145d3 100644
--- a/reading_machine/include/Config.hpp
+++ b/reading_machine/include/Config.hpp
@@ -49,7 +49,7 @@ class Config
   protected :
 
   Utf8String rawInput;
-  bool rawInputIsComplete;
+  bool rawInputIsComplete{true};
   std::size_t wordIndex{0};
   std::size_t characterIndex{0};
   std::size_t currentSentenceStartRawInput{0};