diff --git a/changelog.md b/changelog.md
index f39dc26785..e6d1f6b478 100644
--- a/changelog.md
+++ b/changelog.md
@@ -27,6 +27,7 @@
 - ``proc `-`*(a, b: Time): int64`` in the ``times`` module has changed return type
   to ``times.Duration`` in order to support higher time resolutions.
   The proc is no longer deprecated.
+- ``posix.Timeval.tv_sec`` has changed type to ``posix.Time``.
 
 #### Breaking changes in the compiler
 
diff --git a/lib/deprecated/pure/asyncio.nim b/lib/deprecated/pure/asyncio.nim
index 5fd45b2155..34cabefb06 100644
--- a/lib/deprecated/pure/asyncio.nim
+++ b/lib/deprecated/pure/asyncio.nim
@@ -101,8 +101,8 @@ when defined(windows):
   from winlean import TimeVal, SocketHandle, FD_SET, FD_ZERO, TFdSet,
     FD_ISSET, select
 else:
-  from posix import TimeVal, SocketHandle, FD_SET, FD_ZERO, TFdSet,
-    FD_ISSET, select
+  from posix import TimeVal, Time, Suseconds, SocketHandle, FD_SET, FD_ZERO,
+    TFdSet, FD_ISSET, select
 
 type
   DelegateObj* = object
@@ -556,8 +556,12 @@ proc send*(sock: AsyncSocket, data: string) =
 proc timeValFromMilliseconds(timeout = 500): Timeval =
   if timeout != -1:
     var seconds = timeout div 1000
-    result.tv_sec = seconds.int32
-    result.tv_usec = ((timeout - seconds * 1000) * 1000).int32
+    when defined(posix):
+      result.tv_sec = seconds.Time
+      result.tv_usec = ((timeout - seconds * 1000) * 1000).Suseconds
+    else:
+      result.tv_sec = seconds.int32
+      result.tv_usec = ((timeout - seconds * 1000) * 1000).int32
 
 proc createFdSet(fd: var TFdSet, s: seq[Delegate], m: var int) =
   FD_ZERO(fd)
diff --git a/lib/deprecated/pure/sockets.nim b/lib/deprecated/pure/sockets.nim
index f068c7d560..f0568366ab 100644
--- a/lib/deprecated/pure/sockets.nim
+++ b/lib/deprecated/pure/sockets.nim
@@ -953,8 +953,12 @@ when defined(ssl):
 proc timeValFromMilliseconds(timeout = 500): Timeval =
   if timeout != -1:
     var seconds = timeout div 1000
-    result.tv_sec = seconds.int32
-    result.tv_usec = ((timeout - seconds * 1000) * 1000).int32
+    when defined(posix):
+      result.tv_sec = seconds.Time
+      result.tv_usec = ((timeout - seconds * 1000) * 1000).Suseconds
+    else:
+      result.tv_sec = seconds.int32
+      result.tv_usec = ((timeout - seconds * 1000) * 1000).int32
 
 proc createFdSet(fd: var TFdSet, s: seq[Socket], m: var int) =
   FD_ZERO(fd)
diff --git a/lib/posix/posix_linux_amd64.nim b/lib/posix/posix_linux_amd64.nim
index 9e6211b633..4f114d3949 100644
--- a/lib/posix/posix_linux_amd64.nim
+++ b/lib/posix/posix_linux_amd64.nim
@@ -351,8 +351,8 @@ type
 
   Timeval* {.importc: "struct timeval", header: "<sys/select.h>",
              final, pure.} = object ## struct timeval
-    tv_sec*: clong       ## Seconds.
-    tv_usec*: clong ## Microseconds.
+    tv_sec*: Time       ## Seconds.
+    tv_usec*: Suseconds ## Microseconds.
   TFdSet* {.importc: "fd_set", header: "<sys/select.h>",
            final, pure.} = object
     abi: array[1024 div (8 * sizeof(clong)), clong]
diff --git a/lib/posix/posix_other.nim b/lib/posix/posix_other.nim
index 01bc1c1e5e..ae41263e81 100644
--- a/lib/posix/posix_other.nim
+++ b/lib/posix/posix_other.nim
@@ -335,8 +335,8 @@ type
 
   Timeval* {.importc: "struct timeval", header: "<sys/select.h>",
              final, pure.} = object ## struct timeval
-    tv_sec*: int       ## Seconds.
-    tv_usec*: int ## Microseconds.
+    tv_sec*: Time ## Seconds.
+    tv_usec*: Suseconds ## Microseconds.
   TFdSet* {.importc: "fd_set", header: "<sys/select.h>",
            final, pure.} = object
   Mcontext* {.importc: "mcontext_t", header: "<ucontext.h>",
diff --git a/lib/pure/nativesockets.nim b/lib/pure/nativesockets.nim
index 74b2c9741e..09fa253f12 100644
--- a/lib/pure/nativesockets.nim
+++ b/lib/pure/nativesockets.nim
@@ -616,8 +616,12 @@ proc setBlocking*(s: SocketHandle, blocking: bool) =
 proc timeValFromMilliseconds(timeout = 500): Timeval =
   if timeout != -1:
     var seconds = timeout div 1000
-    result.tv_sec = seconds.int32
-    result.tv_usec = ((timeout - seconds * 1000) * 1000).int32
+    when useWinVersion:
+      result.tv_sec = seconds.int32
+      result.tv_usec = ((timeout - seconds * 1000) * 1000).int32
+    else:
+      result.tv_sec = seconds.Time
+      result.tv_usec = ((timeout - seconds * 1000) * 1000).Suseconds
 
 proc createFdSet(fd: var TFdSet, s: seq[SocketHandle], m: var int) =
   FD_ZERO(fd)
diff --git a/lib/pure/os.nim b/lib/pure/os.nim
index 255a9a8ded..8298024d68 100644
--- a/lib/pure/os.nim
+++ b/lib/pure/os.nim
@@ -1660,7 +1660,7 @@ proc setLastModificationTime*(file: string, t: times.Time) =
   ## Sets the `file`'s last modification time. `OSError` is raised in case of
   ## an error.
   when defined(posix):
-    let unixt = t.toUnix.int
+    let unixt = posix.Time(t.toUnix)
     var timevals = [Timeval(tv_sec: unixt), Timeval(tv_sec: unixt)] # [last access, last modification]
     if utimes(file, timevals.addr) != 0: raiseOSError(osLastError())
   else:
diff --git a/lib/pure/osproc.nim b/lib/pure/osproc.nim
index a51b1f5ab5..bcab5ad3ae 100644
--- a/lib/pure/osproc.nim
+++ b/lib/pure/osproc.nim
@@ -1289,7 +1289,7 @@ elif not defined(useNimRtl):
 
   proc select(readfds: var seq[Process], timeout = 500): int =
     var tv: Timeval
-    tv.tv_sec = 0
+    tv.tv_sec = posix.Time(0)
     tv.tv_usec = timeout * 1000
 
     var rd: TFdSet
diff --git a/lib/pure/times.nim b/lib/pure/times.nim
index 29492379d4..cad32b51ac 100644
--- a/lib/pure/times.nim
+++ b/lib/pure/times.nim
@@ -1752,7 +1752,7 @@ when not defined(JS):
       when defined(posix):
         var a: Timeval
         gettimeofday(a)
-        result = toFloat(a.tv_sec) + toFloat(a.tv_usec)*0.00_0001
+        result = toBiggestFloat(a.tv_sec.int64) + toFloat(a.tv_usec)*0.00_0001
       elif defined(windows):
         var f: winlean.FILETIME
         getSystemTimeAsFileTime(f)