diff --git a/src/app/dialogs/tools/dialogendline.cpp b/src/app/dialogs/tools/dialogendline.cpp
index f0d47c3ed..cc9d6c676 100644
--- a/src/app/dialogs/tools/dialogendline.cpp
+++ b/src/app/dialogs/tools/dialogendline.cpp
@@ -79,10 +79,14 @@ void DialogEndLine::DeployFormulaTextEdit()
     if (ui->plainTextEditFormula->height() < DIALOGENDLINE_MAX_FORMULA_HEIGHT)
     {
         ui->plainTextEditFormula->setFixedHeight(DIALOGENDLINE_MAX_FORMULA_HEIGHT);
+        QIcon icon(":/icon/16x16/go-next.png");
+        ui->pushButtonGrowLength->setIcon(icon);
     }
     else
     {
        ui->plainTextEditFormula->setFixedHeight(this->formulaBaseHeight);
+       QIcon icon(":/icon/16x16/go-down.png");
+       ui->pushButtonGrowLength->setIcon(icon);
     }
 }