diff --git a/src/Gregwar/Captcha/CaptchaBuilder.php b/src/Gregwar/Captcha/CaptchaBuilder.php
index 8dbbd61..2fc5941 100644
--- a/src/Gregwar/Captcha/CaptchaBuilder.php
+++ b/src/Gregwar/Captcha/CaptchaBuilder.php
@@ -362,7 +362,7 @@ protected function writePhrase($image, $phrase, $font, $width, $height)
             $w = $box[2] - $box[0];
             $angle = $this->rand(-$this->maxAngle, $this->maxAngle);
             $offset = $this->rand(-$this->maxOffset, $this->maxOffset);
-            \imagettftext($image, $size, $angle, $x, $y + $offset, $col, $font, $symbol);
+            \imagettftext($image, $size, $angle, floatval($x), $y + $offset, $col, $font, $symbol);
             $x += $w;
         }