diff --git a/src/Goodby/CSV/Import/Standard/Lexer.php b/src/Goodby/CSV/Import/Standard/Lexer.php
index 7631791..4cd6e0f 100644
--- a/src/Goodby/CSV/Import/Standard/Lexer.php
+++ b/src/Goodby/CSV/Import/Standard/Lexer.php
@@ -57,7 +57,7 @@ public function parse($filename, InterpreterInterface $interpreter)
         setlocale(LC_ALL, 'en_US.UTF-8');
 
         foreach ( $csv as $lineNumber => $line ) {
-            if ($ignoreHeader && $lineNumber == 0 || (count($line) === 1 && empty($line[0]))) {
+            if ($ignoreHeader && $lineNumber == 0 || (count($line) === 1 && trim($line[0]) === '')) {
                 continue;
             }
             $interpreter->interpret($line);