diff --git a/src/slic3r/GUI/GLCanvas3D.cpp b/src/slic3r/GUI/GLCanvas3D.cpp
index 511bbfa6fc..ca03a36393 100644
--- a/src/slic3r/GUI/GLCanvas3D.cpp
+++ b/src/slic3r/GUI/GLCanvas3D.cpp
@@ -383,7 +383,7 @@ std::string GLCanvas3D::LayersEditing::get_tooltip(const GLCanvas3D& canvas) con
                 }
             }
             if (h > 0.0f)
-                ret = std::to_string(h);
+                ret = wxString::Format("%.3f",h).ToStdString();
         }
     }
     return ret;