diff --git a/Include/pytime.h b/Include/pytime.h
index bf0dcd86577..027c3d803a4 100644
--- a/Include/pytime.h
+++ b/Include/pytime.h
@@ -67,7 +67,12 @@ PyAPI_FUNC(int) _PyTime_ObjectToTimespec(
 
 
 /* Create a timestamp from a number of seconds. */
-PyAPI_FUNC(_PyTime_t) _PyTime_FromSeconds(int ns);
+PyAPI_FUNC(_PyTime_t) _PyTime_FromSeconds(int seconds);
+
+/* Macro to create a timestamp from a number of seconds, no integer overflow.
+   Only use the macro for small values, prefer _PyTime_FromSeconds(). */
+#define _PYTIME_FROMSECONDS(seconds) \
+            ((_PyTime_t)(seconds) * (1000 * 1000 * 1000))
 
 /* Create a timestamp from a number of nanoseconds. */
 PyAPI_FUNC(_PyTime_t) _PyTime_FromNanoseconds(PY_LONG_LONG ns);
diff --git a/Modules/socketmodule.c b/Modules/socketmodule.c
index 1ecec5a3b9c..8c5c36cdc0d 100644
--- a/Modules/socketmodule.c
+++ b/Modules/socketmodule.c
@@ -839,7 +839,8 @@ sock_call(PySocketSockObject *s,
 
 /* Initialize a new socket object. */
 
-static _PyTime_t defaulttimeout = -1; /* Default timeout for new sockets */
+/* Default timeout for new sockets */
+static _PyTime_t defaulttimeout = _PYTIME_FROMSECONDS(-1);
 
 static void
 init_sockobject(PySocketSockObject *s,