diff --git a/key.ui/src/main/java/de/uka/ilkd/key/gui/actions/QuickSaveAction.java b/key.ui/src/main/java/de/uka/ilkd/key/gui/actions/QuickSaveAction.java
index 8baa2212175..597cda24603 100644
--- a/key.ui/src/main/java/de/uka/ilkd/key/gui/actions/QuickSaveAction.java
+++ b/key.ui/src/main/java/de/uka/ilkd/key/gui/actions/QuickSaveAction.java
@@ -53,13 +53,18 @@ public static void quickSave(MainWindow mainWindow) {
         if (mainWindow.getMediator().ensureProofLoaded()) {
             final String filename = QUICK_SAVE_PATH;
             final Proof proof = mainWindow.getMediator().getSelectedProof();
-            new ProofSaver(proof, filename, KeYConstants.INTERNAL_VERSION).save();
-            final String status = "File quicksaved: " + filename;
-            mainWindow.popupWarning(
-                "Quicksaving file " + filename + " failed:\n" + status,
-                "Quicksave failed");
-            LOGGER.debug("Quicksaving file {} failed.", filename, status);
 
+            String status = new ProofSaver(proof, filename, KeYConstants.INTERNAL_VERSION).save();
+
+            if (status == null) {
+                // success case
+                status = "File quicksaved: " + filename;
+            } else {
+                mainWindow.popupWarning(
+                    "Quicksaving file " + filename + " failed:\n" + status,
+                    "Quicksave failed");
+                LOGGER.debug("Quicksaving file {} failed.", filename, status);
+            }
             mainWindow.setStatusLine(status);
             LOGGER.debug(status);
         } else {