diff --git a/src/plugins/platforms/windows/qwindowsservices.cpp b/src/plugins/platforms/windows/qwindowsservices.cpp
index 9504513a5e..811f3d62bd 100644
--- a/src/plugins/platforms/windows/qwindowsservices.cpp
+++ b/src/plugins/platforms/windows/qwindowsservices.cpp
@@ -125,6 +125,10 @@ static inline bool launchMail(const QUrl &url)
             command.prepend(doubleQuote);
         }
     }
+
+    // Patch: Fix mail launch if no param is expected in this command.
+    if (command.indexOf(QStringLiteral("%1")) < 0) return false;
+
     // Pass the url as the parameter. Should use QProcess::startDetached(),
     // but that cannot handle a Windows command line [yet].
     command.replace(QLatin1String("%1"), url.toString(QUrl::FullyEncoded));