diff --git a/NEWS b/NEWS
index ba1a13bf18f..011ca7dc9a3 100644
--- a/NEWS
+++ b/NEWS
@@ -20,6 +20,10 @@ PHP                                                                        NEWS
   . Implemented FR #70438 (Add IV parameter for openssl_seal and openssl_open)
     (Jakub Zelenka)
 
+- Phpdbg:
+  . Fixed bug #70449 (PHP won't compile on 10.4 and 10.5 because of missing
+    constants). (Bob)
+
 - Streams:
   . Fixed bug #70361 (HTTP stream wrapper doesn't close keep-alive connections).
     (Niklas Keller)
diff --git a/sapi/phpdbg/phpdbg_io.h b/sapi/phpdbg/phpdbg_io.h
index 3e25fc5eeb3..fdd579d5481 100644
--- a/sapi/phpdbg/phpdbg_io.h
+++ b/sapi/phpdbg/phpdbg_io.h
@@ -21,6 +21,11 @@
 
 #include "phpdbg.h"
 
+/* Older versions of glibc <= 2.3.0 and <= OS X 10.5 do not have this constant defined */
+#ifndef AI_NUMERICSERV
+#define AI_NUMERICSERV 0
+#endif
+
 PHPDBG_API int phpdbg_consume_stdin_line(char *buf);
 
 PHPDBG_API int phpdbg_consume_bytes(int sock, char *ptr, int len, int tmo);