diff --git a/3rdparty/indi-gphoto/gphoto_driver.cpp b/3rdparty/indi-gphoto/gphoto_driver.cpp
index a52c8418f7..e9503fdc9d 100644
--- a/3rdparty/indi-gphoto/gphoto_driver.cpp
+++ b/3rdparty/indi-gphoto/gphoto_driver.cpp
@@ -456,7 +456,7 @@ static void *stop_bulb(void *arg)
             if (gphoto->command & DSLR_CMD_BULB_CAPTURE)
             {
                 gettimeofday(&curtime, nullptr);
-                timersub(&curtime, &gphoto->bulb_end, &diff);
+                timersub(&gphoto->bulb_end, &curtime, &diff);
                 timeleft = diff.tv_sec * 1000 + diff.tv_usec / 1000;
                 DEBUGFDEVICE(device, INDI::Logger::DBG_DEBUG, "Time left: %ld ms", timeleft);
             }
diff --git a/libindi/drivers/telescope/lx200_OnStep.cpp b/libindi/drivers/telescope/lx200_OnStep.cpp
index eddf4a2a36..1fcc74364c 100644
--- a/libindi/drivers/telescope/lx200_OnStep.cpp
+++ b/libindi/drivers/telescope/lx200_OnStep.cpp
@@ -426,7 +426,8 @@ bool LX200_OnStep::ISNewNumber(const char *dev, const char *name, double values[
                     BacklashNP.s = IPS_ALERT;
                     IDSetNumber(&BacklashNP, "Error Backlash DEC limit.");
                 }
-                usleep(100000); // time for OnStep to respond to previous cmd
+                const struct timespec timeout = {0, 100000000L};
+                nanosleep(&timeout, NULL); // time for OnStep to respond to previous cmd
                 snprintf(cmd, 9, ":$BR%d#", (int)bklshra);
                 if (sendOnStepCommand(cmd))
                 {
@@ -709,7 +710,8 @@ bool LX200_OnStep::ISNewSwitch(const char *dev, const char *name, ISState *state
                 strcpy(cmd, ":FQ#");
             }
             sendOnStepCommandBlind(cmd);
-            usleep(100000); // Pulse 0,1 s
+            const struct timespec timeout = {0, 100000000L};
+            nanosleep(&timeout, NULL); // Pulse 0,1 s
             if(index != 2)
             {
                 sendOnStepCommandBlind(":FQ#");
@@ -756,7 +758,8 @@ bool LX200_OnStep::ISNewSwitch(const char *dev, const char *name, ISState *state
                 strcpy(cmd, ":fQ#");
             }
             sendOnStepCommandBlind(cmd);
-            usleep(100000); // Pulse 0,1 s
+            const struct timespec timeout = {0, 100000000L};
+            nanosleep(&timeout, NULL); // Pulse 0,1 s
             if(index != 2)
             {
                 sendOnStepCommandBlind(":fQ#");