diff --git a/src/CssMin.php b/src/CssMin.php
index bf21e47..7ccd117 100644
--- a/src/CssMin.php
+++ b/src/CssMin.php
@@ -4933,7 +4933,7 @@ public function parse($index, $char, $previousChar, $state)
 		{
 			$this->parser->pushState("T_AT_FONT_FACE::PREPARE");
 			$this->parser->clearBuffer();
-			return $index + 10;
+			return $index + 10 - 1;
 		}
 		// Start of @font-face declarations
 		elseif ($char === "{" && $state === "T_AT_FONT_FACE::PREPARE")