diff --git a/development/cmake/build.bat b/development/cmake/build.bat
index e82004c547..8da0f206a3 100755
--- a/development/cmake/build.bat
+++ b/development/cmake/build.bat
@@ -67,7 +67,7 @@ cd "%LYX_BUILD%"
 
 
 REM Delete all files indirectory
-::del /s/q *
+del /s/q *
 del CMakeCache.txt
 
 if [%2]==[] (