diff --git a/AltoRouter.php b/AltoRouter.php
index bca1b4e..b0773e7 100644
--- a/AltoRouter.php
+++ b/AltoRouter.php
@@ -13,7 +13,7 @@ class AltoRouter {
 	public function setBasePath($basePath) {
 		$this->basePath = $basePath;
 	}
-	
+
 	/**
 	 * Map a route to a target
 	 *
@@ -101,7 +101,7 @@ class AltoRouter {
 
 		// Strip query string (?a=b) from Request Url
 		if (($strpos = strpos($requestUrl, '?')) !== false) {
-			$requestUrl = substr($requestUrl, $strpos + 1);
+			$requestUrl = substr($requestUrl, 0, $strpos);
 		}
 
 		// set Request Method if it isn't passed as a parameter
@@ -223,4 +223,4 @@ class AltoRouter {
 		}
 		return "`^$route$`";
 	}
-}
\ No newline at end of file
+}