diff --git a/src/gdxviewer/gdxsymbolview.cpp b/src/gdxviewer/gdxsymbolview.cpp
index 3e1a8999d..ff5a05732 100644
--- a/src/gdxviewer/gdxsymbolview.cpp
+++ b/src/gdxviewer/gdxsymbolview.cpp
@@ -298,6 +298,8 @@ void GdxSymbolView::toggleColumnHidden()
 
 void GdxSymbolView::updateNumericalPrecision()
 {
+    if (!mSym)
+        return;
     this->mSym->setNumericalPrecision(ui->sbPrecision->value(), ui->cbSqueezeZeroes->isChecked());
     if (mTvModel)
         ui->tvTableView->reset();