diff --git a/resources/scripts/.appveyor-build-win.ps1 b/resources/scripts/.appveyor-build-win.ps1
index 0903e6c47..a4579d412 100644
--- a/resources/scripts/.appveyor-build-win.ps1
+++ b/resources/scripts/.appveyor-build-win.ps1
@@ -34,7 +34,7 @@ $qmake_args_mysql = "MYSQL_INCDIR=`"$mysql_d_rev/include`" MYSQL_LIBDIR=`"$mysql
 
 echo "$qmake_args_mysql"
 
-qmake.exe "$qmake_args_mysql"
+qmake.exe "`"$qmake_args_mysql`""
 
 nmake.exe sub-mysql
 ls