diff --git a/terminal.cpp b/terminal.cpp
index b23c2b3..3752577 100644
--- a/terminal.cpp
+++ b/terminal.cpp
@@ -178,6 +178,10 @@ void Terminal::keyPress(int key, int modifiers, const QString& text)
 
     resetBackBufferScrollPos();
 
+    // physical sticky shift generates key=0, mod=Qt::ShiftModifier, sticky alt: key=0, mod=0
+    if (key == 0 && (modifiers == Qt::ShiftModifier || modifiers == Qt::NoModifier))
+        return;
+
     if (key > 0xFFFF) {
         int modcode = (modifiers & Qt::ShiftModifier ? 1 : 0) | 
                       (modifiers & Qt::AltModifier ? 2 : 0) |