diff --git a/sapi/fpm/fpm/fastcgi.c b/sapi/fpm/fpm/fastcgi.c
index 4f7f5eab9c8..a6103d2f0ff 100644
--- a/sapi/fpm/fpm/fastcgi.c
+++ b/sapi/fpm/fpm/fastcgi.c
@@ -137,6 +137,7 @@ typedef union _sa_t {
 	struct sockaddr     sa;
 	struct sockaddr_un  sa_unix;
 	struct sockaddr_in  sa_inet;
+	struct sockaddr_in6 sa_inet6;
 } sa_t;
 
 static HashTable fcgi_mgmt_vars;
@@ -1073,12 +1074,17 @@ void fcgi_free_mgmt_var_cb(zval *zv)
 	zend_string_free(Z_STR_P(zv));
 }
 
-char *fcgi_get_last_client_ip() /* {{{ */
+const char *fcgi_get_last_client_ip() /* {{{ */
 {
+	static char str[INET6_ADDRSTRLEN];
+
 	if (client_sa.sa.sa_family == AF_UNIX) {
 		return NULL;
 	}
-	return inet_ntoa(client_sa.sa_inet.sin_addr);
+	if (client_sa.sa.sa_family == AF_INET) {
+		return inet_ntop(client_sa.sa.sa_family, &client_sa.sa_inet.sin_addr, str, INET6_ADDRSTRLEN);
+	}
+	return inet_ntop(client_sa.sa.sa_family, &client_sa.sa_inet6.sin6_addr, str, INET6_ADDRSTRLEN);
 }
 /* }}} */
 /*
diff --git a/sapi/fpm/fpm/fastcgi.h b/sapi/fpm/fpm/fastcgi.h
index 6d1bb38dbaf..9c96f763a91 100644
--- a/sapi/fpm/fpm/fastcgi.h
+++ b/sapi/fpm/fpm/fastcgi.h
@@ -133,7 +133,7 @@ int fcgi_flush(fcgi_request *req, int close);
 void fcgi_set_mgmt_var(const char * name, size_t name_len, const char * value, size_t value_len);
 void fcgi_free_mgmt_var_cb(zval *ptr);
 
-char *fcgi_get_last_client_ip();
+const char *fcgi_get_last_client_ip();
 
 /*
  * Local variables:
diff --git a/sapi/fpm/fpm/fpm_log.c b/sapi/fpm/fpm/fpm_log.c
index 4e1a057db19..c71281b0b97 100644
--- a/sapi/fpm/fpm/fpm_log.c
+++ b/sapi/fpm/fpm/fpm_log.c
@@ -367,7 +367,7 @@ int fpm_log_write(char *log_format TSRMLS_DC) /* {{{ */
 
 				case 'R': /* remote IP address */
 					if (!test) {
-						char *tmp = fcgi_get_last_client_ip();
+						const char *tmp = fcgi_get_last_client_ip();
 						len2 = snprintf(b, FPM_LOG_BUFFER - len, "%s", tmp ? tmp : "-");
 					}
 					break;