diff --git a/ext/standard/basic_functions.c b/ext/standard/basic_functions.c
index 5c6b1ce1d1d1..29ed6ddf14e9 100644
--- a/ext/standard/basic_functions.c
+++ b/ext/standard/basic_functions.c
@@ -598,6 +598,20 @@ PHP_FUNCTION(ip2long)
 	if (addr_len == 0 || inet_pton(AF_INET, addr, &ip) != 1) {
 		RETURN_FALSE;
 	}
+#ifdef _AIX
+	/*
+	AIX accepts IP strings with extraneous 0 (192.168.042.42 will be treated as
+	192.168.42.42), while Linux doesn't.
+	For consistency, we convert back the IP to a string and check if it is equal to
+	the original string. If not, the IP should be considered invalid.
+	*/
+	char str[INET_ADDRSTRLEN];
+	const char* result = inet_ntop(AF_INET, &ip, str, sizeof(str));
+	ZEND_ASSERT(result != NULL);
+	if (strcmp(addr, result) != 0) {
+		RETURN_FALSE;
+	}
+#endif
 	RETURN_LONG(ntohl(ip.s_addr));
 }
 /* }}} */