diff --git a/src/libxrpl/protocol/STParsedJSON.cpp b/src/libxrpl/protocol/STParsedJSON.cpp
index db199a73ed..02dfde3966 100644
--- a/src/libxrpl/protocol/STParsedJSON.cpp
+++ b/src/libxrpl/protocol/STParsedJSON.cpp
@@ -353,7 +353,9 @@ parseUint32(
             else
             {
                 ret = detail::make_stvar<STResult>(
-                    field, beast::lexicalCastThrow<Integer>(value.asString()));
+                    field,
+                    safe_cast<typename STResult::value_type>(
+                        beast::lexicalCastThrow<Integer>(value.asString())));
             }
         }
         if (!ret)
diff --git a/src/test/protocol/STParsedJSON_test.cpp b/src/test/protocol/STParsedJSON_test.cpp
index 082a4624f2..bd62196a99 100644
--- a/src/test/protocol/STParsedJSON_test.cpp
+++ b/src/test/protocol/STParsedJSON_test.cpp
@@ -140,6 +140,30 @@ public:
             }
         }
 
+        {
+            std::string const goodJson(
+                R"({"CloseResolution":"19","Method":"250",)"
+                R"("TransactionResult":"tecFROZEN"})");
+            std::string const expectedJson(
+                R"({"CloseResolution":19,"Method":250,)"
+                R"("TransactionResult":"tecFROZEN"})");
+
+            Json::Value jv;
+            if (BEAST_EXPECT(parseJSONString(goodJson, jv)))
+            {
+                // Integer values are always parsed as int,
+                // unless they're too big. We want a small uint.
+                jv["CloseResolution"] = Json::UInt(19);
+                STParsedJSONObject parsed("test", jv);
+                if (BEAST_EXPECT(parsed.object))
+                {
+                    std::string const& serialized(
+                        to_string(parsed.object->getJson(JsonOptions::none)));
+                    BEAST_EXPECT(serialized == expectedJson);
+                }
+            }
+        }
+
         {
             std::string const json(R"({"CloseResolution":19,"Method":250,)"
                                    R"("TransactionResult":"terQUEUED"})");
@@ -227,6 +251,26 @@ public:
             }
         }
 
+        {
+            std::string const goodJson(R"({"CloseResolution":19,"Method":250,)"
+                                       R"("TransferFee":"65535"})");
+            std::string const expectedJson(
+                R"({"CloseResolution":19,"Method":250,)"
+                R"("TransferFee":65535})");
+
+            Json::Value jv;
+            if (BEAST_EXPECT(parseJSONString(goodJson, jv)))
+            {
+                STParsedJSONObject parsed("test", jv);
+                if (BEAST_EXPECT(parsed.object))
+                {
+                    std::string const& serialized(
+                        to_string(parsed.object->getJson(JsonOptions::none)));
+                    BEAST_EXPECT(serialized == expectedJson);
+                }
+            }
+        }
+
         {
             std::string const json(R"({"CloseResolution":19,"Method":250,)"
                                    R"("TransferFee":"65536"})");