diff --git a/eo/src/serial/String.h b/eo/src/serial/String.h
index 43a2cffa8..6d81937f3 100644
--- a/eo/src/serial/String.h
+++ b/eo/src/serial/String.h
@@ -3,6 +3,7 @@
 
 # include <string>
 # include <sstream>
+# include <limits>
 
 # include "Entity.h"
 
@@ -60,6 +61,7 @@ template<class T>
 inline void String::deserialize( T & value )
 {
     std::stringstream ss;
+    ss.precision(std::numeric_limits<double>::digits10 + 1);
     ss << *this;
     ss >> value;
 }
diff --git a/eo/src/serial/Utils.h b/eo/src/serial/Utils.h
index 70fd2f75a..f40c08d92 100644
--- a/eo/src/serial/Utils.h
+++ b/eo/src/serial/Utils.h
@@ -76,6 +76,7 @@ namespace eoserial
     String* make( const T & value )
     {
         std::stringstream ss;
+        ss.precision(std::numeric_limits<double>::digits10 + 1);
         ss << value;
         return new String( ss.str() );
     }