diff --git a/src/lib_json/json_reader.cpp b/src/lib_json/json_reader.cpp
index 23e4607..2eae15d 100644
--- a/src/lib_json/json_reader.cpp
+++ b/src/lib_json/json_reader.cpp
@@ -2024,7 +2024,7 @@ std::istream& operator>>(std::istream& sin, Value& root) {
             "Error from reader: %s",
             errs.c_str());
 
-    throwRuntimeError("reader error");
+    throwRuntimeError(errs);
   }
   return sin;
 }