Upstream-status: merged with commit ccec6c2f6770484278b25c3335d4bd8882bc4c87

diff --git a/configure.ac b/configure.ac
index b54d5b49..584b0179 100644
--- a/configure.ac
+++ b/configure.ac
@@ -83,6 +83,7 @@ case "${host_os}" in
     ;;
   linux*)
     SYS=linux
+    CPPFLAGS="$CPPFLAGS -D_POSIX_C_SOURCE=200809L"
     ;;
   darwin*)
     SYS=darwin
diff --git a/src/compat/msvc/unistd.h b/src/compat/msvc/unistd.h
index d43d4796..abcc1c61 100644
--- a/src/compat/msvc/unistd.h
+++ b/src/compat/msvc/unistd.h
@@ -50,4 +50,6 @@
 typedef int mode_t;
 #include <BaseTsd.h>
 
+#define nanosleep(x) Sleep((x) / 1000000)
+
 #endif
diff --git a/tools/dhtcnode.c b/tools/dhtcnode.c
index cdb04714..f78a7f7f 100644
--- a/tools/dhtcnode.c
+++ b/tools/dhtcnode.c
@@ -24,12 +24,17 @@
 #include <stdlib.h>
 #include <stdatomic.h>
 #include <inttypes.h>
+#include <time.h>
 
 #include <getopt.h>
 #include <readline/readline.h>
 #include <readline/history.h>
 #include <arpa/inet.h>
 
+#ifdef _WIN32
+#include <windows.h>
+#endif
+
 struct op_context {
     dht_runner* runner;
     atomic_bool stop;
@@ -287,7 +292,12 @@ int main(int argc, char **argv)
 
     // Wait until shutdown callback is called
     while (!atomic_load(&ctx.stop)) {
-        usleep(10000);
+#ifdef _WIN32
+        Sleep(10);              // 10ms
+#else
+        struct timespec ts = {0, 10000000}; // 10ms
+        nanosleep(&ts, NULL);
+#endif
     }
     dht_runner_delete(runner);
     return EXIT_SUCCESS;