diff --git a/src/json.hpp b/src/json.hpp
index a52d2c242..5f47d1580 100644
--- a/src/json.hpp
+++ b/src/json.hpp
@@ -9121,6 +9121,13 @@ basic_json_parser_66:
             {
                 // parse with strtod
                 result.m_value.number_float = str_to_float_t(static_cast<number_float_t*>(nullptr), NULL);
+
+                // replace infinity and NAN by null
+                if (not std::isfinite(result.m_value.number_float))
+                {
+                    type = value_t::null;
+                    result.m_value = basic_json::json_value();
+                }
             }
 
             // save the type
diff --git a/src/json.hpp.re2c b/src/json.hpp.re2c
index 476903cdf..627c9185e 100644
--- a/src/json.hpp.re2c
+++ b/src/json.hpp.re2c
@@ -8270,6 +8270,13 @@ class basic_json
             {
                 // parse with strtod
                 result.m_value.number_float = str_to_float_t(static_cast<number_float_t*>(nullptr), NULL);
+
+                // replace infinity and NAN by null
+                if (not std::isfinite(result.m_value.number_float))
+                {
+                    type = value_t::null;
+                    result.m_value = basic_json::json_value();
+                }
             }
 
             // save the type
diff --git a/test/src/unit-regression.cpp b/test/src/unit-regression.cpp
index 16d9351a0..2c3964b69 100644
--- a/test/src/unit-regression.cpp
+++ b/test/src/unit-regression.cpp
@@ -489,4 +489,10 @@ TEST_CASE("regression tests")
         j["/this/that/2"_json_pointer] = 27;
         CHECK(j == json({{"this", {{"that", {nullptr, nullptr, 27}}}}}));
     }
+
+    SECTION("issue #329 - serialized value not always can be parsed")
+    {
+        json j = json::parse("22e2222");
+        CHECK(j == json());
+    }
 }