diff --git a/src/qt/guiutil.cpp b/src/qt/guiutil.cpp
--- a/src/qt/guiutil.cpp
+++ b/src/qt/guiutil.cpp
@@ -643,7 +643,7 @@
     if (chain == CBaseChainParams::MAIN) {
         return GetAutostartDir() / "bitcoin.desktop";
     }
-    return GetAutostartDir() / strprintf("bitcoin-%s.lnk", chain);
+    return GetAutostartDir() / strprintf("bitcoin-%s.desktop", chain);
 }
 
 bool GetStartOnSystemStartup() {