diff --git a/internal/field/field.go b/internal/field/field.go
index a14d9d89..6ab30b89 100644
--- a/internal/field/field.go
+++ b/internal/field/field.go
@@ -184,9 +184,13 @@ func ValueOf(data string) Value {
 		} else if math.IsNaN(num) {
 			return Value{kind: Number, data: "NaN", num: nan}
 		}
-		return Value{kind: Number, data: data, num: num}
-	}
-	if gjson.Valid(data) {
+		// Make sure that this is a JSON compatible number.
+		// For example, "000123" and "000_123" both parse as floats but aren't
+		// really Numbers that can be represents in JSON.
+		if gjson.Valid(data) {
+			return Value{kind: Number, data: data, num: num}
+		}
+	} else if gjson.Valid(data) {
 		data = strings.TrimSpace(data)
 		r := gjson.Parse(data)
 		switch r.Type {
diff --git a/internal/field/field_test.go b/internal/field/field_test.go
index 26830a03..31fdf751 100644
--- a/internal/field/field_test.go
+++ b/internal/field/field_test.go
@@ -130,5 +130,6 @@ func TestWeight(t *testing.T) {
 }
 
 func TestNumber(t *testing.T) {
-	assert.Assert(ValueOf("012").Num() == 12)
+	assert.Assert(ValueOf("12").Num() == 12)
+	assert.Assert(ValueOf("012").Num() == 0)
 }
diff --git a/internal/field/list_test.go b/internal/field/list_test.go
index 769fafe8..9fc7a5e2 100644
--- a/internal/field/list_test.go
+++ b/internal/field/list_test.go
@@ -63,7 +63,7 @@ func TestList(t *testing.T) {
 	})
 	assert.Assert(names == "fellohellojellonello")
 	assert.Assert(datas == "123456789012")
-	assert.Assert(nums == 1380)
+	assert.Assert(nums == 1368)
 
 	names = ""
 	datas = ""