diff --git a/src/classes/PMusrCanvas.cpp b/src/classes/PMusrCanvas.cpp
index c9ac362f..73a810f3 100644
--- a/src/classes/PMusrCanvas.cpp
+++ b/src/classes/PMusrCanvas.cpp
@@ -937,7 +937,13 @@ void PMusrCanvas::Done(Int_t status)
 void PMusrCanvas::HandleCmdKey(Int_t event, Int_t x, Int_t y, TObject *selected)
 {
   if (event != kKeyPress)
-     return;
+    return;
+
+  // this is a workaround which should prevent that the key event is executed if
+  // a text/latex is written into the canvas.
+  if (!strcmp(selected->GetTitle(), "dataTheoryPad"))
+    return;
+
 
   if (fBatchMode) {
     if (fStartWithAvg) { // this is needed to get the averaging in the batch mode