diff --git a/src/core/wee-string.c b/src/core/wee-string.c
index cbd69738d..d54e24ec2 100644
--- a/src/core/wee-string.c
+++ b/src/core/wee-string.c
@@ -947,13 +947,13 @@ string_regex_flags (const char *regex, int default_flags, int *flags)
  */
 
 int
-string_regcomp (regex_t *preg, const char *regex, int default_flags)
+string_regcomp (void *preg, const char *regex, int default_flags)
 {
     const char *ptr_regex;
     int flags;
 
     ptr_regex = string_regex_flags (regex, default_flags, &flags);
-    return regcomp (preg, ptr_regex, flags);
+    return regcomp ((regex_t *)preg, ptr_regex, flags);
 }
 
 /*
@@ -1274,7 +1274,7 @@ string_replace_regex_get_replace (const char *string, regmatch_t *regex_match,
  */
 
 char *
-string_replace_regex (const char *string, regex_t *regex, const char *replace)
+string_replace_regex (const char *string, void *regex, const char *replace)
 {
     char *result, *result2, *str_replace;
     int length, length_replace, start_offset, i, rc, end;
@@ -1297,7 +1297,8 @@ string_replace_regex (const char *string, regex_t *regex, const char *replace)
             regex_match[i].rm_so = -1;
         }
 
-        rc = regexec (regex, result + start_offset, 10, regex_match, 0);
+        rc = regexec ((regex_t *)regex, result + start_offset, 10, regex_match,
+                      0);
         /*
          * no match found: exit the loop (if rm_eo == 0, it is an empty match
          * at beginning of string: we consider there is no match, to prevent an
diff --git a/src/core/wee-string.h b/src/core/wee-string.h
index 4fdd229d7..15c3cb697 100644
--- a/src/core/wee-string.h
+++ b/src/core/wee-string.h
@@ -51,13 +51,13 @@ extern char *string_convert_escaped_chars (const char *string);
 extern char *string_mask_to_regex (const char *mask);
 extern const char *string_regex_flags (const char *regex, int default_flags,
                                        int *flags);
-extern int string_regcomp (regex_t *preg, const char *regex, int default_flags);
+extern int string_regcomp (void *preg, const char *regex, int default_flags);
 extern int string_has_highlight (const char *string,
                                  const char *highlight_words);
 extern int string_has_highlight_regex_compiled (const char *string,
                                                 regex_t *regex);
 extern int string_has_highlight_regex (const char *string, const char *regex);
-extern char *string_replace_regex (const char *string, regex_t *regex,
+extern char *string_replace_regex (const char *string, void *regex,
                                    const char *replace);
 extern char **string_split (const char *string, const char *separators,
                             int keep_eol, int num_items_max, int *num_items);
diff --git a/src/plugins/weechat-plugin.h b/src/plugins/weechat-plugin.h
index 1b939ef6f..2cb562cdb 100644
--- a/src/plugins/weechat-plugin.h
+++ b/src/plugins/weechat-plugin.h
@@ -28,7 +28,6 @@ extern "C" {
 
 #include <sys/types.h>
 #include <sys/socket.h>
-#include <regex.h>
 
 /* some systems like GNU/Hurd do not define PATH_MAX */
 #ifndef PATH_MAX
@@ -244,11 +243,11 @@ struct t_weechat_plugin
     char *(*string_mask_to_regex) (const char *mask);
     const char *(*string_regex_flags) (const char *regex, int default_flags,
                                        int *flags);
-    int (*string_regcomp) (regex_t *preg, const char *regex, int default_flags);
+    int (*string_regcomp) (void *preg, const char *regex, int default_flags);
     int (*string_has_highlight) (const char *string,
                                  const char *highlight_words);
     int (*string_has_highlight_regex) (const char *string, const char *regex);
-    char *(*string_replace_regex) (const char *string, regex_t *regex,
+    char *(*string_replace_regex) (const char *string, void *regex,
                                    const char *replace);
     char **(*string_split) (const char *string, const char *separators,
                             int keep_eol, int num_items_max, int *num_items);