diff --git a/ext/json/json.c b/ext/json/json.c
index 5517da601d5..d017753de6f 100644
--- a/ext/json/json.c
+++ b/ext/json/json.c
@@ -712,14 +712,14 @@ PHP_JSON_API void php_json_decode_ex(zval *return_value, char *str, int str_len,
 
 		RETVAL_NULL();
 		if (trim_len == 4) {
-			if (!strncasecmp(trim, "null", trim_len)) {
+			if (!strncmp(trim, "null", trim_len)) {
 				/* We need to explicitly clear the error because its an actual NULL and not an error */
 				jp->error_code = PHP_JSON_ERROR_NONE;
 				RETVAL_NULL();
-			} else if (!strncasecmp(trim, "true", trim_len)) {
+			} else if (!strncmp(trim, "true", trim_len)) {
 				RETVAL_BOOL(1);
 			}
-		} else if (trim_len == 5 && !strncasecmp(trim, "false", trim_len)) {
+		} else if (trim_len == 5 && !strncmp(trim, "false", trim_len)) {
 			RETVAL_BOOL(0);
 		}
 
diff --git a/ext/json/tests/bug64874_part2.phpt b/ext/json/tests/bug64874_part2.phpt
new file mode 100644
index 00000000000..338fc1141ab
--- /dev/null
+++ b/ext/json/tests/bug64874_part2.phpt
@@ -0,0 +1,69 @@
+--TEST--
+Case-sensitivity part of bug #64874 ("json_decode handles whitespace and case-sensitivity incorrectly")
+--SKIPIF--
+<?php if (!extension_loaded("json")) print "skip"; ?>
+--FILE--
+<?php
+function decode($json) {
+    var_dump(json_decode($json));
+    echo ((json_last_error() !== 0) ? 'ERROR' : 'SUCCESS') . PHP_EOL;
+}
+
+// Only lowercase should work
+decode('true');
+decode('True');
+decode('[true]');
+decode('[True]');
+echo PHP_EOL;
+
+decode('false');
+decode('False');
+decode('[false]');
+decode('[False]');
+echo PHP_EOL;
+
+decode('null');
+decode('Null');
+decode('[null]');
+decode('[Null]');
+echo PHP_EOL;
+
+echo "Done\n";
+--EXPECT--
+bool(true)
+SUCCESS
+NULL
+ERROR
+array(1) {
+  [0]=>
+  bool(true)
+}
+SUCCESS
+NULL
+ERROR
+
+bool(false)
+SUCCESS
+NULL
+ERROR
+array(1) {
+  [0]=>
+  bool(false)
+}
+SUCCESS
+NULL
+ERROR
+
+NULL
+SUCCESS
+NULL
+ERROR
+array(1) {
+  [0]=>
+  NULL
+}
+SUCCESS
+NULL
+ERROR
+
+Done