diff --git a/ext/standard/tests/streams/gh15937.phpt b/ext/standard/tests/streams/gh15937.phpt
new file mode 100644
index 0000000000000..db0564342b13b
--- /dev/null
+++ b/ext/standard/tests/streams/gh15937.phpt
@@ -0,0 +1,16 @@
+--TEST--
+GH-15937 (stream overflow on timeout setting)
+--SKIPIF--
+<?php if (getenv("SKIP_ONLINE_TESTS")) die("skip online test"); ?>
+--FILE--
+<?php
+$config = [
+    'http' => [
+        'timeout' => PHP_INT_MAX,
+    ],
+];
+$ctx = stream_context_create($config);
+var_dump(fopen("http://www.example.com", "r", false, $ctx));
+?>
+--EXPECTF--
+resource(%d) of type (stream)
diff --git a/main/php_network.h b/main/php_network.h
index a3b7ba7ab3180..fda61b87cb4c9 100644
--- a/main/php_network.h
+++ b/main/php_network.h
@@ -162,7 +162,7 @@ PHPAPI int php_poll2(php_pollfd *ufds, unsigned int nfds, int timeout);
 /* timeval-to-timeout (for poll(2)) */
 static inline int php_tvtoto(struct timeval *timeouttv)
 {
-	if (timeouttv) {
+	if (timeouttv && timeouttv->tv_sec >= 0 && timeouttv->tv_sec <= ((INT_MAX - 1000) / 1000)) {
 		return (timeouttv->tv_sec * 1000) + (timeouttv->tv_usec / 1000);
 	}
 	return -1;