diff --git a/src/css-parsing-tests/component_value_list.json b/src/css-parsing-tests/component_value_list.json
index ed26e125..6d4bcddd 100644
--- a/src/css-parsing-tests/component_value_list.json
+++ b/src/css-parsing-tests/component_value_list.json
@@ -223,7 +223,7 @@
 	["error", "bad-url"]
 ],
 
-"12 +34 -45 .67 +.89 -.01 2.3 +45.0 -0.67", [
+"12 +34 -45 .67 +.89 -.01 2.3 +45.0 -0.67 1000001", [
 	["number", "12", 12, "integer"], " ",
 	["number", "+34", 34, "integer"], " ",
 	["number", "-45", -45, "integer"], " ",
@@ -232,7 +232,8 @@
 	["number", "-0.01", -0.01, "number"], " ",
 	["number", "2.3", 2.3, "number"], " ",
 	["number", "+45.0", 45, "number"], " ",
-	["number", "-0.67", -0.67, "number"]
+	["number", "-0.67", -0.67, "number"], " ",
+	["number", "1000001", 1000001, "integer"]
 ],
 
 "12e2 +34e+1 -45E-0 .68e+3 +.79e-1 -.01E2 2.3E+1 +45.0e6 -0.67e0", [
diff --git a/src/serializer.rs b/src/serializer.rs
index ed325fc9..78175925 100644
--- a/src/serializer.rs
+++ b/src/serializer.rs
@@ -44,6 +44,12 @@ where
             decimal_point: false,
             scientific: false,
         }
+    } else if let Some(int_val) = int_value {
+        write!(dest, "{}", int_val)?;
+        Notation {
+            decimal_point: false,
+            scientific: false,
+        }
     } else {
         dtoa_short::write(dest, value)?
     };