diff --git a/spikeinterface_gui/tracemapview.py b/spikeinterface_gui/tracemapview.py
index 6ac7b7f..b34f354 100644
--- a/spikeinterface_gui/tracemapview.py
+++ b/spikeinterface_gui/tracemapview.py
@@ -131,7 +131,8 @@ def _qt_seek(self, t):
         sr = self.controller.sampling_frequency
 
         self.scroll_time.valueChanged.disconnect(self._qt_on_scroll_time)
-        value = self.controller.time_to_sample_index(t)
+        sample = self.controller.time_to_sample_index(t)
+        value = int(sample / self.scroll_step)
         self.scroll_time.setValue(value)
         self.scroll_time.setPageStep(int(sr*xsize))
         self.scroll_time.valueChanged.connect(self._qt_on_scroll_time)
diff --git a/spikeinterface_gui/traceview.py b/spikeinterface_gui/traceview.py
index 5376cdf..e79f29d 100644
--- a/spikeinterface_gui/traceview.py
+++ b/spikeinterface_gui/traceview.py
@@ -13,6 +13,9 @@
 #   * segment change
 #   * 
 
+INT32_MAX = 2147483647  # 2**31 - 1
+
+
 class MixinViewTrace:
 
     MAX_RETRIEVE_TIME_FOR_BUSY_CURSOR = 0.5  # seconds
@@ -214,7 +217,7 @@ def _qt_initialize_plot(self):
     def _qt_update_scroll_step(self):
         segment_index = self.controller.get_time()[1]
         length = self.controller.get_num_samples(segment_index)
-        num_scrollbar_steps = max(2**16, length)
+        num_scrollbar_steps = min(INT32_MAX, length)
         self.scroll_step = length / num_scrollbar_steps
 
         t_start, t_stop = self.controller.get_t_start_t_stop()