diff --git a/src/SeerParallelStacksCommon.cpp b/src/SeerParallelStacksCommon.cpp
index 1e6af1f..641de81 100644
--- a/src/SeerParallelStacksCommon.cpp
+++ b/src/SeerParallelStacksCommon.cpp
@@ -43,6 +43,15 @@ const QString& SeerParallelStacksFrame::function () const {
     return _function;
 }
 
+QString SeerParallelStacksFrame::functionOrAddr () const {
+
+    if (_function == "??") {
+        return _addr;
+    }
+
+    return _function;
+}
+
 const QString& SeerParallelStacksFrame::arch () const {
     return _arch;
 }
diff --git a/src/SeerParallelStacksCommon.h b/src/SeerParallelStacksCommon.h
index 294b94f..1f50429 100644
--- a/src/SeerParallelStacksCommon.h
+++ b/src/SeerParallelStacksCommon.h
@@ -19,6 +19,7 @@ class SeerParallelStacksFrame {
         int                 level           () const;
         const QString&      addr            () const;
         const QString&      function        () const;
+        QString             functionOrAddr  () const;
         const QString&      arch            () const;
         const QString&      from            () const;
         const QString&      file            () const;
diff --git a/src/SeerParallelStacksGraphicsView.cpp b/src/SeerParallelStacksGraphicsView.cpp
index a4c3a44..7415fd1 100644
--- a/src/SeerParallelStacksGraphicsView.cpp
+++ b/src/SeerParallelStacksGraphicsView.cpp
@@ -128,7 +128,7 @@ SeerParallelStacksStackBoxItem::SeerParallelStacksStackBoxItem(const SeerParalle
     qreal maxTextW = headerW;
 
     for (const auto& frame : _stack.frames) {
-        maxTextW = std::max(maxTextW, (qreal)normFm.horizontalAdvance(frame.function()));
+        maxTextW = std::max(maxTextW, (qreal)normFm.horizontalAdvance(frame.functionOrAddr()));
     }
 
     _width  = maxTextW + 2 * _kPadX;
@@ -190,7 +190,7 @@ void SeerParallelStacksStackBoxItem::paint(QPainter* painter, const QStyleOption
     painter->setPen(colors.frameText);
 
     for (const auto& frame : _stack.frames) {
-        painter->drawText(QRectF(_kPadX, y, innerW, _kRowH), Qt::AlignLeft | Qt::AlignVCenter, frame.function());
+        painter->drawText(QRectF(_kPadX, y, innerW, _kRowH), Qt::AlignLeft | Qt::AlignVCenter, frame.functionOrAddr());
         y += _kRowH;
     }
 
@@ -311,7 +311,7 @@ void SeerParallelStacksStackBoxItem::handleShowPopup() {
     QString frame;
 
     if (_stack.frames.size() > 0) {
-        frame = _stack.frames[0].function();
+        frame = _stack.frames[0].functionOrAddr();
     }
 
     _popup = new SeerParallelStacksPopupTableWidget();