diff --git a/Source/Engines/UI/EngineConfigGUI.cs b/Source/Engines/UI/EngineConfigGUI.cs
index abe8e6fc..c40ed385 100644
--- a/Source/Engines/UI/EngineConfigGUI.cs
+++ b/Source/Engines/UI/EngineConfigGUI.cs
@@ -1106,6 +1106,8 @@ internal string GetThrustString(ConfigNode node)
             float thrust = _module.scale * _techLevels.ThrustTL(node.GetValue(_module.thrustRating), node);
             if (thrust >= 100f)
                 return $"{thrust:N0} kN";
+            if (thrust < 0.01f)
+                return KSPUtil.PrintSI(thrust * 1e3f, "N", 3);
             return $"{thrust:N2} kN";
         }