diff --git a/src/wp-includes/class-wp-http-streams.php b/src/wp-includes/class-wp-http-streams.php
index 998dbde34e..afb94cdbf5 100644
--- a/src/wp-includes/class-wp-http-streams.php
+++ b/src/wp-includes/class-wp-http-streams.php
@@ -416,7 +416,7 @@ class WP_Http_Streams {
 	 *
 	 * @param resource $stream The PHP Stream which the SSL request is being made over
 	 * @param string   $host   The hostname being requested
-	 * @return bool If the cerficiate presented in $stream is valid for $host
+	 * @return bool If the certificate presented in $stream is valid for $host
 	 */
 	public static function verify_ssl_certificate( $stream, $host ) {
 		$context_options = stream_context_get_options( $stream );
diff --git a/src/wp-includes/class-wp-simplepie-sanitize-kses.php b/src/wp-includes/class-wp-simplepie-sanitize-kses.php
index ae462bf1cb..183fe07ca7 100644
--- a/src/wp-includes/class-wp-simplepie-sanitize-kses.php
+++ b/src/wp-includes/class-wp-simplepie-sanitize-kses.php
@@ -8,7 +8,7 @@
  */
 
 /**
- * Core class used to implement SimpliePie feed sanitization.
+ * Core class used to implement SimplePie feed sanitization.
  *
  * Extends the SimplePie_Sanitize class to use KSES, because
  * we cannot universally count on DOMDocument being available.
diff --git a/src/wp-includes/class-wp-text-diff-renderer-table.php b/src/wp-includes/class-wp-text-diff-renderer-table.php
index 3db5a51d85..43c0d0e422 100644
--- a/src/wp-includes/class-wp-text-diff-renderer-table.php
+++ b/src/wp-includes/class-wp-text-diff-renderer-table.php
@@ -255,7 +255,7 @@ class WP_Text_Diff_Renderer_Table extends Text_Diff_Renderer {
 		 * - match is numeric: an index in other column.
 		 * - match is 'X': no match. It is a new row.
 		 * *_rows are column vectors for the orig column and the final column.
-		 * - row >= 0: an indix of the $orig or $final array.
+		 * - row >= 0: an index of the $orig or $final array.
 		 * - row < 0: a blank row for that column.
 		 */
 		list($orig_matches, $final_matches, $orig_rows, $final_rows) = $this->interleave_changed_lines( $orig, $final );