diff --git a/lib/private/security/securerandom.php b/lib/private/security/securerandom.php
index 348d04c9cc..409285fd09 100644
--- a/lib/private/security/securerandom.php
+++ b/lib/private/security/securerandom.php
@@ -76,7 +76,7 @@ class SecureRandom implements ISecureRandom {
 
 	/**
 	 * Generate a random string of specified length.
-	 * @param string $length The length of the generated string
+	 * @param int $length The length of the generated string
 	 * @param string $characters An optional list of characters to use if no characterlist is
 	 * 							specified all valid base64 characters are used.
 	 * @return string
diff --git a/lib/public/security/isecurerandom.php b/lib/public/security/isecurerandom.php
index 69e6ec21b1..cbe2d4e0d5 100644
--- a/lib/public/security/isecurerandom.php
+++ b/lib/public/security/isecurerandom.php
@@ -69,7 +69,7 @@ interface ISecureRandom {
 
 	/**
 	 * Generate a random string of specified length.
-	 * @param string $length The length of the generated string
+	 * @param int $length The length of the generated string
 	 * @param string $characters An optional list of characters to use if no characterlist is
 	 * 							specified all valid base64 characters are used.
 	 * @return string