diff --git a/visualization/tier4_state_rviz_plugin/src/custom_container.cpp b/visualization/tier4_state_rviz_plugin/src/custom_container.cpp
index 681cebbefd492..5f0895ddae9e7 100644
--- a/visualization/tier4_state_rviz_plugin/src/custom_container.cpp
+++ b/visualization/tier4_state_rviz_plugin/src/custom_container.cpp
@@ -51,7 +51,7 @@ void CustomContainer::paintEvent(QPaintEvent *)
 
   // Draw background
   QPainterPath path;
-  path.addRoundedRect(rect(), height() / 2, height() / 2);  // Use height for rounded corners
+  path.addRoundedRect(rect(), height() / 2.0, height() / 2.0);  // Use height for rounded corners
   painter.setPen(Qt::NoPen);
   painter.setBrush(QColor(
     autoware::state_rviz_plugin::colors::default_colors.surface.c_str()));  // Background color
diff --git a/visualization/tier4_state_rviz_plugin/src/custom_icon_label.cpp b/visualization/tier4_state_rviz_plugin/src/custom_icon_label.cpp
index 6e4d32d40f7fb..e01d2904ffbd2 100644
--- a/visualization/tier4_state_rviz_plugin/src/custom_icon_label.cpp
+++ b/visualization/tier4_state_rviz_plugin/src/custom_icon_label.cpp
@@ -65,7 +65,7 @@ void CustomIconLabel::paintEvent(QPaintEvent *)
 
   // Draw background circle
   QPainterPath path;
-  path.addEllipse(width() / 2 - radius, height() / 2 - radius, diameter, diameter);
+  path.addEllipse(width() / 2.0 - radius, height() / 2.0 - radius, diameter, diameter);
   painter.setPen(Qt::NoPen);
   painter.setBrush(backgroundColor);
   painter.drawPath(path);
diff --git a/visualization/tier4_state_rviz_plugin/src/custom_segmented_button.cpp b/visualization/tier4_state_rviz_plugin/src/custom_segmented_button.cpp
index 8063bdc0fbc28..87b4f7dba4653 100644
--- a/visualization/tier4_state_rviz_plugin/src/custom_segmented_button.cpp
+++ b/visualization/tier4_state_rviz_plugin/src/custom_segmented_button.cpp
@@ -66,7 +66,7 @@ void CustomSegmentedButton::paintEvent(QPaintEvent *)
 
   // Draw background
   QPainterPath path;
-  path.addRoundedRect(rect(), height() / 2, height() / 2);
+  path.addRoundedRect(rect(), height() / 2.0, height() / 2.0);
 
   painter.setPen(Qt::NoPen);
   painter.setBrush(
diff --git a/visualization/tier4_state_rviz_plugin/src/custom_segmented_button_item.cpp b/visualization/tier4_state_rviz_plugin/src/custom_segmented_button_item.cpp
index cdd3aa0d25263..192b1cbfa86f5 100644
--- a/visualization/tier4_state_rviz_plugin/src/custom_segmented_button_item.cpp
+++ b/visualization/tier4_state_rviz_plugin/src/custom_segmented_button_item.cpp
@@ -125,7 +125,7 @@ void CustomSegmentedButtonItem::paintEvent(QPaintEvent *)
   }
 
   QPainterPath path;
-  double radius = (height() - 2) / 2;
+  double radius = (height() - 2.0) / 2.0;
 
   path.setFillRule(Qt::WindingFill);
   if (isFirstButton) {