diff --git a/src/AutoPilotPlugins/APM/APMAirframeComponentController.cc b/src/AutoPilotPlugins/APM/APMAirframeComponentController.cc
index de5630cd1dd98c7abe8bd9a1e9044be92dba795b..4cb5ce43d7b5ca893e623d662cc16a8ad7d0e7d7 100644
--- a/src/AutoPilotPlugins/APM/APMAirframeComponentController.cc
+++ b/src/AutoPilotPlugins/APM/APMAirframeComponentController.cc
@@ -231,7 +231,7 @@ void APMAirframeComponentController::_githubJsonDownloadFinished(QString remoteF
 
 void APMAirframeComponentController::_githubJsonDownloadError(QString errorMsg)
 {
-    qgcApp()->showMessage(tr("Param file github json download failed: % 1").arg(errorMsg));
+    qgcApp()->showMessage(tr("Param file github json download failed: %1").arg(errorMsg));
     qgcApp()->restoreOverrideCursor();
 }