diff --git a/msvc/libdivecomputer.vcproj b/msvc/libdivecomputer.vcproj
index 5dcad41..da5187d 100644
--- a/msvc/libdivecomputer.vcproj
+++ b/msvc/libdivecomputer.vcproj
@@ -398,6 +398,10 @@
 				RelativePath="..\src\parser.c"
 				>
 			</File>
+			<File
+				RelativePath="..\src\platform.c"
+				>
+			</File>
 			<File
 				RelativePath="..\src\rbstream.c"
 				>
diff --git a/src/Makefile.am b/src/Makefile.am
index b33acd0..e78f37d 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -64,7 +64,7 @@ libdivecomputer_la_SOURCES = \
 	diverite_nitekq.h diverite_nitekq.c diverite_nitekq_parser.c \
 	citizen_aqualand.h citizen_aqualand.c citizen_aqualand_parser.c \
 	divesystem_idive.h divesystem_idive.c divesystem_idive_parser.c \
-	platform.h \
+	platform.h platform.c \
 	ringbuffer.h ringbuffer.c \
 	rbstream.h rbstream.c \
 	checksum.h checksum.c \
diff --git a/src/irda.c b/src/irda.c
index 2cc58ab..8c5d612 100644
--- a/src/irda.c
+++ b/src/irda.c
@@ -202,11 +202,7 @@ dc_irda_iterator_new (dc_iterator_t **out, dc_context_t *context, dc_descriptor_
 		// modified by the previous getsockopt call.
 		size = sizeof (data);
 
-#ifdef _WIN32
-		Sleep (1000);
-#else
-		sleep (1);
-#endif
+		dc_platform_sleep (1000);
 	}
 
 	S_CLOSE (fd);
diff --git a/src/platform.c b/src/platform.c
new file mode 100644
index 0000000..16a3c08
--- /dev/null
+++ b/src/platform.c
@@ -0,0 +1,51 @@
+/*
+ * libdivecomputer
+ *
+ * Copyright (C) 2021 Jef Driesen
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301 USA
+ */
+
+#ifdef _WIN32
+#define WIN32_LEAN_AND_MEAN
+#define NOGDI
+#include <windows.h>
+#else
+#include <time.h>
+#include <errno.h>
+#endif
+
+#include "platform.h"
+
+int
+dc_platform_sleep (unsigned int milliseconds)
+{
+#ifdef _WIN32
+	Sleep (milliseconds);
+#else
+	struct timespec ts;
+	ts.tv_sec  = (milliseconds / 1000);
+	ts.tv_nsec = (milliseconds % 1000) * 1000000;
+
+	while (nanosleep (&ts, &ts) != 0) {
+		if (errno != EINTR ) {
+			return -1;
+		}
+	}
+#endif
+
+	return 0;
+}
diff --git a/src/platform.h b/src/platform.h
index ab82fb7..438aa7d 100644
--- a/src/platform.h
+++ b/src/platform.h
@@ -45,6 +45,8 @@ extern "C" {
 #endif
 #endif
 
+int dc_platform_sleep(unsigned int milliseconds);
+
 #ifdef __cplusplus
 }
 #endif /* __cplusplus */
diff --git a/src/serial_posix.c b/src/serial_posix.c
index 4fbcb96..8872982 100644
--- a/src/serial_posix.c
+++ b/src/serial_posix.c
@@ -30,7 +30,6 @@
 #include <fcntl.h>	// fcntl
 #include <termios.h>	// tcgetattr, tcsetattr, cfsetispeed, cfsetospeed, tcflush, tcsendbreak
 #include <sys/ioctl.h>	// ioctl
-#include <time.h>	// nanosleep
 #ifdef HAVE_LINUX_SERIAL_H
 #include <linux/serial.h>
 #endif
@@ -59,6 +58,7 @@
 #include "iostream-private.h"
 #include "iterator-private.h"
 #include "descriptor-private.h"
+#include "platform.h"
 #include "timer.h"
 
 #define DIRNAME "/dev"
@@ -995,16 +995,10 @@ dc_serial_get_lines (dc_iostream_t *abstract, unsigned int *value)
 static dc_status_t
 dc_serial_sleep (dc_iostream_t *abstract, unsigned int timeout)
 {
-	struct timespec ts;
-	ts.tv_sec  = (timeout / 1000);
-	ts.tv_nsec = (timeout % 1000) * 1000000;
-
-	while (nanosleep (&ts, &ts) != 0) {
+	if (dc_platform_sleep (timeout) != 0) {
 		int errcode = errno;
-		if (errcode != EINTR ) {
-			SYSERROR (abstract->context, errcode);
-			return syserror (errcode);
-		}
+		SYSERROR (abstract->context, errcode);
+		return syserror (errcode);
 	}
 
 	return DC_STATUS_SUCCESS;
diff --git a/src/serial_win32.c b/src/serial_win32.c
index 2b009f0..aeeeb83 100644
--- a/src/serial_win32.c
+++ b/src/serial_win32.c
@@ -32,6 +32,7 @@
 #include "iostream-private.h"
 #include "iterator-private.h"
 #include "descriptor-private.h"
+#include "platform.h"
 
 static dc_status_t dc_serial_iterator_next (dc_iterator_t *iterator, void *item);
 static dc_status_t dc_serial_iterator_free (dc_iterator_t *iterator);
@@ -836,7 +837,11 @@ dc_serial_get_lines (dc_iostream_t *abstract, unsigned int *value)
 static dc_status_t
 dc_serial_sleep (dc_iostream_t *abstract, unsigned int timeout)
 {
-	Sleep (timeout);
+	if (dc_platform_sleep (timeout) != 0) {
+		DWORD errcode = GetLastError ();
+		SYSERROR (abstract->context, errcode);
+		return syserror (errcode);
+	}
 
 	return DC_STATUS_SUCCESS;
 }
diff --git a/src/socket.c b/src/socket.c
index 84d58a4..a99a8f2 100644
--- a/src/socket.c
+++ b/src/socket.c
@@ -20,6 +20,7 @@
  */
 
 #include "socket.h"
+#include "platform.h"
 
 #include "common-private.h"
 #include "context-private.h"
@@ -357,21 +358,11 @@ dc_socket_ioctl (dc_iostream_t *abstract, unsigned int request, void *data, size
 dc_status_t
 dc_socket_sleep (dc_iostream_t *abstract, unsigned int timeout)
 {
-#ifdef _WIN32
-	Sleep (timeout);
-#else
-	struct timespec ts;
-	ts.tv_sec  = (timeout / 1000);
-	ts.tv_nsec = (timeout % 1000) * 1000000;
-
-	while (nanosleep (&ts, &ts) != 0) {
-		int errcode = errno;
-		if (errcode != EINTR ) {
-			SYSERROR (abstract->context, errcode);
-			return dc_socket_syserror (errcode);
-		}
+	if (dc_platform_sleep (timeout) != 0) {
+		s_errcode_t errcode = S_ERRNO;
+		SYSERROR (abstract->context, errcode);
+		return dc_socket_syserror(errcode);
 	}
-#endif
 
 	return DC_STATUS_SUCCESS;
 }