diff --git a/config.m4 b/config.m4
index ed69e91..36c25b5 100644
--- a/config.m4
+++ b/config.m4
@@ -19,12 +19,29 @@ if test "$PHP_SYNC" != "no"; then
   ], [
     have_shm_open=yes
     AC_MSG_RESULT([yes])
-  ], [
-    AC_MSG_ERROR([shm_open() is not available on this platform])
-  ])
 
-  PHP_ADD_LIBRARY(rt,,SYNC_SHARED_LIBADD)
-  PHP_SUBST(SYNC_SHARED_LIBADD)
+    PHP_ADD_LIBRARY(rt,,SYNC_SHARED_LIBADD)
+    PHP_SUBST(SYNC_SHARED_LIBADD)
+  ], [
+    AC_MSG_RESULT([no (attempting fallback)])
+
+    dnl # Fallback attempt to link without -lrt.
+    AC_MSG_CHECKING([for shm_open in -pthread])
+
+    LIBS="$SAVED_LIBS -pthread"
+
+    AC_TRY_LINK([
+      #include <fcntl.h>
+      #include <sys/mman.h>
+    ], [
+      int fp = shm_open("", O_RDWR | O_CREAT | O_EXCL, 0666);
+    ], [
+      have_shm_open=yes
+      AC_MSG_RESULT([yes])
+    ], [
+      AC_MSG_ERROR([shm_open() is not available on this platform])
+    ])
+  ])
 
   dnl # Finish defining the basic extension support.
   AC_DEFINE(HAVE_SYNC, 1, [Whether you have synchronization object support])
diff --git a/package.xml b/package.xml
index 4b46444..be85702 100644
--- a/package.xml
+++ b/package.xml
@@ -10,10 +10,10 @@
   <email>cubic@php.net</email>
   <active>yes</active>
  </lead>
- <date>2021-04-09</date>
+ <date>2023-06-28</date>
  <time>05:00:00</time>
  <version>
-  <release>1.1.2</release>
+  <release>1.1.3</release>
   <api>1.1.0</api>
  </version>
  <stability>
@@ -22,7 +22,8 @@
  </stability>
  <license uri="http://opensource.org/licenses/MIT">MIT License</license>
  <notes>
-- Fixed missing macros for PHP 8 (thanks Remi).
+- Fixed Mac OSX support.
+- Fixed PHP 8.2 nullability issues.
  </notes>
  <contents>
   <dir name="/">
diff --git a/php_sync.h b/php_sync.h
index 7abf8e8..8b0caac 100644
--- a/php_sync.h
+++ b/php_sync.h
@@ -12,7 +12,7 @@
 extern zend_module_entry sync_module_entry;
 #define phpext_sync_ptr &sync_module_entry
 
-#define PHP_SYNC_VERSION   "1.1.2"
+#define PHP_SYNC_VERSION   "1.1.3"
 
 #ifdef PHP_WIN32
 #	define PHP_SYNC_API __declspec(dllexport)
diff --git a/sync.c b/sync.c
index 6d35f8a..f235088 100644
--- a/sync.c
+++ b/sync.c
@@ -885,7 +885,7 @@ PHP_METHOD(sync_Mutex, __construct)
 	size_t Pos, TempSize;
 #endif
 
-	if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "|s", &name, &name_len) == FAILURE)  return;
+	if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "|s!", &name, &name_len) == FAILURE)  return;
 
 	obj = (sync_Mutex_object *)PORTABLE_zend_object_store_get_object();
 
@@ -1126,7 +1126,7 @@ PHP_METHOD(sync_Semaphore, __construct)
 	size_t Pos, TempSize;
 #endif
 
-	if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "|sll", &name, &name_len, &initialval, &autounlock) == FAILURE)  return;
+	if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "|s!ll", &name, &name_len, &initialval, &autounlock) == FAILURE)  return;
 
 	obj = (sync_Semaphore_object *)PORTABLE_zend_object_store_get_object();
 
@@ -1342,7 +1342,7 @@ PHP_METHOD(sync_Event, __construct)
 	size_t Pos, TempSize;
 #endif
 
-	if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "|sll", &name, &name_len, &manual, &prefire) == FAILURE)  return;
+	if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "|s!ll", &name, &name_len, &manual, &prefire) == FAILURE)  return;
 
 	obj = (sync_Event_object *)PORTABLE_zend_object_store_get_object();
 
@@ -1675,7 +1675,7 @@ PHP_METHOD(sync_ReaderWriter, __construct)
 	size_t Pos, TempSize;
 #endif
 
-	if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "|sl", &name, &name_len, &autounlock) == FAILURE)  return;
+	if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "|s!l", &name, &name_len, &autounlock) == FAILURE)  return;
 
 	obj = (sync_ReaderWriter_object *)PORTABLE_zend_object_store_get_object();