diff --git a/build.cmd b/build.cmd
index 8f1fdbb..801abe4 100644
--- a/build.cmd
+++ b/build.cmd
@@ -9,7 +9,7 @@ set GIT6=C:\Program Files (x86)\Microsoft Visual Studio\2017\Enterprise\Common7\
 
 set PATH=C:\w64devkit\bin;%GIT1%;%GIT2%;%GIT3%;%GIT4%;%GIT5%;%GIT6%;%PATH%
 
-
+make clean
 make _WIN32_WINNT=0x0400
 
 pause