diff --git a/source/blender/draw/engines/overlay/shaders/infos/overlay_armature_info.hh b/source/blender/draw/engines/overlay/shaders/infos/overlay_armature_info.hh
index aefab3234b2..31589f3d65e 100644
--- a/source/blender/draw/engines/overlay/shaders/infos/overlay_armature_info.hh
+++ b/source/blender/draw/engines/overlay/shaders/infos/overlay_armature_info.hh
@@ -137,7 +137,7 @@ GPU_SHADER_CREATE_INFO(overlay_armature_shape_solid_clipped)
     .additional_info("overlay_armature_shape_solid", "drw_clipped");
 
 GPU_SHADER_INTERFACE_INFO(overlay_armature_shape_wire_iface, "geometry_in")
-    .smooth(Type::VEC4, "finalColor")
+    .flat(Type::VEC4, "finalColor")
     .flat(Type::FLOAT, "wire_width");
 
 GPU_SHADER_INTERFACE_INFO(overlay_armature_shape_wire_geom_iface, "geometry_out")