diff --git a/ext/posix/posix.c b/ext/posix/posix.c
index 9f85fa60add..1955c1d0727 100644
--- a/ext/posix/posix.c
+++ b/ext/posix/posix.c
@@ -766,6 +766,10 @@ PHP_FUNCTION(posix_access)
 	}
 
 	path = expand_filepath(filename, NULL TSRMLS_CC);
+	if (!path) {
+		POSIX_G(last_error) = EIO;
+		RETURN_FALSE;
+	}
 
 	if (php_check_open_basedir_ex(path, 0 TSRMLS_CC)) {
 		efree(path);
diff --git a/ext/posix/tests/001.phpt b/ext/posix/tests/001.phpt
new file mode 100644
index 00000000000..e6c629ce63a
--- /dev/null
+++ b/ext/posix/tests/001.phpt
@@ -0,0 +1,12 @@
+--TEST--
+posix_access() with bogus paths
+--SKIPIF--
+<?php if (!extension_loaded('posix')) echo 'skip'; ?>
+--FILE--
+<?php
+
+var_dump(posix_access(str_repeat('bogus path', 1042)));
+
+?>
+--EXPECT--
+bool(false)