diff --git a/release_notes.md b/release_notes.md
index 128cd6fbf..16f6f7726 100644
--- a/release_notes.md
+++ b/release_notes.md
@@ -1,5 +1,6 @@
 ###In Development
   - [#232](https://github.com/Mehdik/Humanizer/pull/232): Adding code & tests to handle Arabic numbers to ordinal 
+  - [#235](https://github.com/Mehdik/Humanizer/pull/235): Fixed the conversion for "1 millon" in SpanishNumberToWordsConverter
 
 [Commits](https://github.com/MehdiK/Humanizer/compare/v1.23.1...master)
 
diff --git a/src/Humanizer.Tests/Localisation/es/NumberToWordsTests.cs b/src/Humanizer.Tests/Localisation/es/NumberToWordsTests.cs
index 76d42918c..5dcaf3a7d 100644
--- a/src/Humanizer.Tests/Localisation/es/NumberToWordsTests.cs
+++ b/src/Humanizer.Tests/Localisation/es/NumberToWordsTests.cs
@@ -17,22 +17,23 @@ public NumberToWordsTests() : base("es-ES") { }
         [InlineData(100, "cien")]
         [InlineData(1000, "mil")]
         [InlineData(100000, "cien mil")]
-        [InlineData(1000000, "millón")]
+        [InlineData(1000000, "un millón")]
         [InlineData(10000000, "diez millones")]
         [InlineData(100000000, "cien millones")]
         [InlineData(1000000000, "mil millones")]
         [InlineData(111, "ciento once")]
         [InlineData(1111, "mil ciento once")]
         [InlineData(111111, "ciento once mil ciento once")]
-        [InlineData(1111111, "millón ciento once mil ciento once")]
+        [InlineData(1111111, "un millón ciento once mil ciento once")]
         [InlineData(11111111, "once millones ciento once mil ciento once")]
         [InlineData(111111111, "ciento once millones ciento once mil ciento once")]
+        [InlineData(1001111111, "mil millones un millón ciento once mil ciento once")]
         [InlineData(1111111111, "mil millones ciento once millones ciento once mil ciento once")]
         [InlineData(123, "ciento veintitrés")]
         [InlineData(1234, "mil doscientos treinta y cuatro")]
         [InlineData(12345, "doce mil trescientos cuarenta y cinco")]
         [InlineData(123456, "ciento veintitrés mil cuatrocientos cincuenta y seis")]
-        [InlineData(1234567, "millón doscientos treinta y cuatro mil quinientos sesenta y siete")]
+        [InlineData(1234567, "un millón doscientos treinta y cuatro mil quinientos sesenta y siete")]
         [InlineData(12345678, "doce millones trescientos cuarenta y cinco mil seiscientos setenta y ocho")]
         [InlineData(123456789, "ciento veintitrés millones cuatrocientos cincuenta y seis mil setecientos ochenta y nueve")]
         [InlineData(1234567890, "mil millones doscientos treinta y cuatro millones quinientos sesenta y siete mil ochocientos noventa")]
diff --git a/src/Humanizer/Localisation/NumberToWords/SpanishNumberToWordsConverter.cs b/src/Humanizer/Localisation/NumberToWords/SpanishNumberToWordsConverter.cs
index c3b964c34..a3afe02ab 100644
--- a/src/Humanizer/Localisation/NumberToWords/SpanishNumberToWordsConverter.cs
+++ b/src/Humanizer/Localisation/NumberToWords/SpanishNumberToWordsConverter.cs
@@ -47,7 +47,7 @@ public override string Convert(int number)
             if ((number / 1000000) > 0)
             {
                 parts.Add(number / 1000000 == 1
-                    ? string.Format("millón")
+                    ? string.Format("un millón")
                     : string.Format("{0} millones", Convert(number / 1000000)));
 
                 number %= 1000000;