diff --git a/src/gui/gui.cpp b/src/gui/gui.cpp
index 74b1a82af..dbeaa8308 100644
--- a/src/gui/gui.cpp
+++ b/src/gui/gui.cpp
@@ -5946,7 +5946,12 @@ bool FurnaceGUI::loop() {
                 *curPosInRowsLambda-=(songLength-songLoopedSectionLength); // a hack so progress bar does not jump?
               }
             }
-            *progressLambda=(float)((*curPosInRowsLambda)+((*totalLoopsLambda)-(*loopsLeftLambda))*songLength+lengthOfOneFile*(*curFileLambda))/(float)totalLength;
+            if (totalLength<0.1) {
+              // DON'T
+              *progressLambda=0;
+            } else {
+              *progressLambda=(float)((*curPosInRowsLambda)+((*totalLoopsLambda)-(*loopsLeftLambda))*songLength+lengthOfOneFile*(*curFileLambda))/(float)totalLength;
+            }
           }
         );
       }