diff --git a/NEWS b/NEWS
index a3b9a4c6c00..58f290ae8b5 100644
--- a/NEWS
+++ b/NEWS
@@ -47,6 +47,9 @@ PHP                                                                        NEWS
 - PDO_PGSQL:
   . Fixed error message allocation of PDO PgSQL. (SATO Kentaro)
 
+- Sockets:
+  . Avoid void* arithmetic in sockets/multicast.c on NetBSD. (David Carlier)
+
 - Spl:
   . Fixed bug #75917 (SplFileObject::seek broken with CSV flags). (Aliaksandr
     Bystry)
diff --git a/Zend/zend_cpuinfo.c b/Zend/zend_cpuinfo.c
index 57889bb3f4c..08843a9401f 100644
--- a/Zend/zend_cpuinfo.c
+++ b/Zend/zend_cpuinfo.c
@@ -75,7 +75,7 @@ static void __zend_cpuid(uint32_t func, uint32_t subfunc, zend_cpu_info *cpuinfo
 
 #if defined(__i386__) || defined(__x86_64__)
 /* Function based on compiler-rt implementation. */
-static unsigned get_xcr0_eax() {
+static unsigned get_xcr0_eax(void) {
 # if defined(__GNUC__) || defined(__clang__)
 	// Check xgetbv; this uses a .byte sequence instead of the instruction
 	// directly because older assemblers do not include support for xgetbv and
@@ -90,7 +90,7 @@ static unsigned get_xcr0_eax() {
 # endif
 }
 
-static bool is_avx_supported() {
+static bool is_avx_supported(void) {
 	if (!(cpuinfo.ecx & ZEND_CPU_FEATURE_AVX)) {
 		/* No support for AVX */
 		return 0;
diff --git a/ext/sockets/multicast.c b/ext/sockets/multicast.c
index 0b2f10d09fb..f713d44ff88 100644
--- a/ext/sockets/multicast.c
+++ b/ext/sockets/multicast.c
@@ -784,7 +784,7 @@ int php_add4_to_if_index(struct in_addr *addr, php_socket *php_sock, unsigned *i
 	}
 
 	for (p = if_conf.ifc_buf;
-		 p < if_conf.ifc_buf + if_conf.ifc_len;
+		 p < ((char *)if_conf.ifc_buf) + if_conf.ifc_len;
 		 p += entry_len) {
 		/* p may be misaligned on macos. */
 		struct ifreq cur_req;