--- a/src/core/ngx_regex.h
+++ b/src/core/ngx_regex.h
@@ -12,24 +12,38 @@
 #include <ngx_config.h>
 #include <ngx_core.h>
 
+
+#if (NGX_PCRE2)
+
+#define PCRE2_CODE_UNIT_WIDTH  8
+#include <pcre2.h>
+
+#define NGX_REGEX_NO_MATCHED   PCRE2_ERROR_NOMATCH   /* -1 */
+
+typedef pcre2_code  ngx_regex_t;
+
+#else
+
 #include <pcre.h>
 
-
-#define NGX_REGEX_NO_MATCHED  PCRE_ERROR_NOMATCH   /* -1 */
-
-#define NGX_REGEX_CASELESS    PCRE_CASELESS
-
+#define NGX_REGEX_NO_MATCHED   PCRE_ERROR_NOMATCH    /* -1 */
 
 typedef struct {
     pcre        *code;
     pcre_extra  *extra;
 } ngx_regex_t;
 
+#endif
+
+
+#define NGX_REGEX_CASELESS     0x00000001
+#define NGX_REGEX_MULTILINE    0x00000002
+
 
 typedef struct {
     ngx_str_t     pattern;
     ngx_pool_t   *pool;
-    ngx_int_t     options;
+    ngx_uint_t    options;
 
     ngx_regex_t  *regex;
     int           captures;
@@ -49,10 +63,14 @@ typedef struct {
 void ngx_regex_init(void);
 ngx_int_t ngx_regex_compile(ngx_regex_compile_t *rc);
 
-#define ngx_regex_exec(re, s, captures, size)                                \
-    pcre_exec(re->code, re->extra, (const char *) (s)->data, (s)->len, 0, 0, \
-              captures, size)
-#define ngx_regex_exec_n      "pcre_exec()"
+ngx_int_t ngx_regex_exec(ngx_regex_t *re, ngx_str_t *s, int *captures,
+    ngx_uint_t size);
+
+#if (NGX_PCRE2)
+#define ngx_regex_exec_n       "pcre2_match()"
+#else
+#define ngx_regex_exec_n       "pcre_exec()"
+#endif
 
 ngx_int_t ngx_regex_exec_array(ngx_array_t *a, ngx_str_t *s, ngx_log_t *log);