diff --git a/src/wp-includes/class-json.php b/src/wp-includes/class-json.php
index 7f34d3fcab..93a353623d 100644
--- a/src/wp-includes/class-json.php
+++ b/src/wp-includes/class-json.php
@@ -252,7 +252,7 @@ class Services_JSON
     *
     * @param    mixed   $var    any number, boolean, string, array, or object to be encoded.
     *                           see argument 1 to Services_JSON() above for array-parsing behavior.
-    *                           if var is a strng, note that encode() always expects it
+    *                           if var is a string, note that encode() always expects it
     *                           to be in ASCII or UTF-8 format!
     *
     * @return   mixed   JSON string representation of input var or an error if a problem occurs
@@ -268,7 +268,7 @@ class Services_JSON
     *
     * @param    mixed   $var    any number, boolean, string, array, or object to be encoded.
     *                           see argument 1 to Services_JSON() above for array-parsing behavior.
-    *                           if var is a strng, note that encode() always expects it
+    *                           if var is a string, note that encode() always expects it
     *                           to be in ASCII or UTF-8 format!
     *
     * @return   mixed   JSON string representation of input var or an error if a problem occurs
@@ -289,7 +289,7 @@ class Services_JSON
     *
     * @param    mixed   $var    any number, boolean, string, array, or object to be encoded.
     *                           see argument 1 to Services_JSON() above for array-parsing behavior.
-    *                           if var is a strng, note that encode() always expects it
+    *                           if var is a string, note that encode() always expects it
     *                           to be in ASCII or UTF-8 format!
     *
     * @return   mixed   JSON string representation of input var or an error if a problem occurs