diff --git a/src/AnsiPainter.coffee b/src/AnsiPainter.coffee
index 6472553..9261a36 100644
--- a/src/AnsiPainter.coffee
+++ b/src/AnsiPainter.coffee
@@ -60,7 +60,7 @@ module.exports = class AnsiPainter
 
   _getStylesForTagName: (name) ->
     unless tags[name]?
-      throw Error "Unkown tag name `#{name}`"
+      throw Error "Unknown tag name `#{name}`"
 
     tags[name]
 
diff --git a/src/ansiPainter/styles.coffee b/src/ansiPainter/styles.coffee
index ea5f6df..83dcf59 100644
--- a/src/ansiPainter/styles.coffee
+++ b/src/ansiPainter/styles.coffee
@@ -43,7 +43,7 @@ styles.color = (str) ->
   return '' if str is 'none'
   code = codes[str]
   unless code?
-    throw Error "Unkown color `#{str}`"
+    throw Error "Unknown color `#{str}`"
 
   "\x1b[" + code + "m"
 
@@ -51,7 +51,7 @@ styles.bg = (str) ->
   return '' if str is 'none'
   code = codes['bg-' + str]
   unless code?
-    throw Error "Unkown bg color `#{str}`"
+    throw Error "Unknown bg color `#{str}`"
 
   "\x1B[" + code + "m"
 
diff --git a/src/layout/block/linePrependor/Default.coffee b/src/layout/block/linePrependor/Default.coffee
index ac02a13..923672f 100644
--- a/src/layout/block/linePrependor/Default.coffee
+++ b/src/layout/block/linePrependor/Default.coffee
@@ -28,7 +28,7 @@ module.exports = class DefaultLinePrependor extends require './_LinePrependor'
           addToLeft = self.pad left
           addToRight = self.pad diff - left
         else
-          throw Error "Unkown alignment `#{alignment}`"
+          throw Error "Unknown alignment `#{alignment}`"
       output = addToLeft + char + addToRight
     else
       output = self.pad @_config.amount
diff --git a/src/renderKid/styleApplier/_common.coffee b/src/renderKid/styleApplier/_common.coffee
index e94114d..a23e3dc 100644
--- a/src/renderKid/styleApplier/_common.coffee
+++ b/src/renderKid/styleApplier/_common.coffee
@@ -7,14 +7,14 @@ module.exports = _common =
     if style.color?
       tagName = 'color-' + style.color
       unless AnsiPainter.tags[tagName]?
-        throw Error "Unkown color `#{style.color}`"
+        throw Error "Unknown color `#{style.color}`"
 
       tagsToAdd.push tagName
 
     if style.background?
       tagName = 'bg-' + style.background
       unless AnsiPainter.tags[tagName]?
-        throw Error "Unkown background `#{style.background}`"
+        throw Error "Unknown background `#{style.background}`"
 
       tagsToAdd.push tagName
 
diff --git a/src/renderKid/styles/rule/DeclarationBlock.coffee b/src/renderKid/styles/rule/DeclarationBlock.coffee
index 3bcf867..0df7248 100644
--- a/src/renderKid/styles/rule/DeclarationBlock.coffee
+++ b/src/renderKid/styles/rule/DeclarationBlock.coffee
@@ -21,7 +21,7 @@ module.exports = class DeclarationBlock
       return Arbitrary
 
     unless cls = declarationClasses[prop]
-      throw Error "Unkown property `#{prop}`. Write it as `_#{prop}` if you're defining a custom property"
+      throw Error "Unknown property `#{prop}`. Write it as `_#{prop}` if you're defining a custom property"
 
     return cls
 
diff --git a/src/tools.coffee b/src/tools.coffee
index 67df13f..489fd4d 100644
--- a/src/tools.coffee
+++ b/src/tools.coffee
@@ -72,7 +72,7 @@ module.exports = self =
             process.stdout.getWindowSize(1)[0]
           else if tty.getWindowSize
             tty.getWindowSize()[1]
-          else if process.stdout.columns and process.stdout.rows
-            process.stdout.rows
+          else if process.stdout.columns
+            process.stdout.columns
 
     if typeof cols is 'number' && cols > 30 then cols else 80
\ No newline at end of file