diff --git a/CHANGELOG.md b/CHANGELOG.md
index b269ccc..aaf2ec4 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,7 @@
 
 Enhancements:
 
+* relax_column_count: validation refinements
 * relax: validation refinements
 * delimiter: validation refinements
 * max_record_size: validation refinements
diff --git a/lib/es5/index.js b/lib/es5/index.js
index 5164625..5375cb7 100644
--- a/lib/es5/index.js
+++ b/lib/es5/index.js
@@ -55,7 +55,6 @@ var default_options = {
   from_line: 1,
   objname: undefined,
   // TODO create a max_comment_size
-  relax_column_count: false,
   skip_empty_lines: false,
   skip_lines_with_empty_values: false,
   skip_lines_with_error: false,
@@ -243,6 +242,14 @@ function (_Transform) {
       options.relax = false;
     } else {
       throw new Error("Invalid Option: relax must be a boolean, got ".concat(JSON.stringify(options.relax)));
+    } // Normalize option `relax_column_count`
+
+
+    if (typeof options.relax_column_count === 'boolean') {// Great, nothing to do
+    } else if (options.relax_column_count === undefined || options.relax_column_count === null) {
+      options.relax_column_count = false;
+    } else {
+      throw new Error("Invalid Option: relax_column_count must be a boolean, got ".concat(JSON.stringify(options.relax_column_count)));
     } // Normalize options `trim`, `ltrim` and `rtrim`
 
 
diff --git a/lib/index.js b/lib/index.js
index c7b9e2b..3705a0f 100644
--- a/lib/index.js
+++ b/lib/index.js
@@ -15,7 +15,6 @@ const default_options = {
   from_line: 1,
   objname: undefined,
   // TODO create a max_comment_size
-  relax_column_count: false,
   skip_empty_lines: false,
   skip_lines_with_empty_values: false,
   skip_lines_with_error: false,
@@ -175,6 +174,14 @@ class Parser extends Transform {
     }else{
       throw new Error(`Invalid Option: relax must be a boolean, got ${JSON.stringify(options.relax)}`)
     }
+    // Normalize option `relax_column_count`
+    if(typeof options.relax_column_count === 'boolean'){
+      // Great, nothing to do
+    }else if(options.relax_column_count === undefined || options.relax_column_count === null){
+      options.relax_column_count = false
+    }else{
+      throw new Error(`Invalid Option: relax_column_count must be a boolean, got ${JSON.stringify(options.relax_column_count)}`)
+    }
     // Normalize options `trim`, `ltrim` and `rtrim`
     if(options.trim === true && options.ltrim !== false){
       options.ltrim = true
diff --git a/test/option.relax_column_count.coffee b/test/option.relax_column_count.coffee
index 7795a06..6942287 100644
--- a/test/option.relax_column_count.coffee
+++ b/test/option.relax_column_count.coffee
@@ -2,6 +2,18 @@
 parse = require '../lib'
 
 describe 'Option `relax_column_count`', ->
+  
+  it 'validation', ->
+    parse '', relax_column_count: true, (->)
+    parse '', relax_column_count: false, (->)
+    parse '', relax_column_count: null, (->)
+    parse '', relax_column_count: undefined, (->)
+    (->
+      parse '', relax_column_count: 1, (->)
+    ).should.throw 'Invalid Option: relax_column_count must be a boolean, got 1'
+    (->
+      parse '', relax_column_count: 'oh no', (->)
+    ).should.throw 'Invalid Option: relax_column_count must be a boolean, got "oh no"'
 
   it 'throw error by default', (next) ->
     parse """