diff --git a/build.bat b/build.bat
index 1fd13623..7366b358 100644
--- a/build.bat
+++ b/build.bat
@@ -45,8 +45,8 @@ set cl_common=     /I..\src\ /I..\local\ /nologo /FC /Z7 /MP
 set clang_common=  -I..\src\ -I..\local\ -maes -mssse3 -msse4 -gcodeview -fdiagnostics-absolute-paths -Wall -Wno-missing-braces -Wno-unused-function -Wno-writable-strings -Wno-unused-value -Wno-unused-variable -Wno-unused-local-typedef -Wno-deprecated-register -Wno-deprecated-declarations -Wno-unused-but-set-variable -Wno-single-bit-bitfield-constant-conversion -Xclang -flto-visibility-public-std -D_USE_MATH_DEFINES -Dstrdup=_strdup -Dgnu_printf=printf
 set cl_debug=      call cl /Od /D_DEBUG %cl_common%
 set cl_release=    call cl /O2 /DNDEBUG %cl_common%
-set clang_debug=   call clang -g -O0 /D_DEBUG %clang_common%
-set clang_release= call clang -g -O3 /DNDEBUG %clang_common% 
+set clang_debug=   call clang -g -O0 -D_DEBUG %clang_common%
+set clang_release= call clang -g -O3 -DNDEBUG %clang_common% 
 set cl_link=       /link /natvis:"%~dp0\src\natvis\base.natvis"
 set clang_link=    -Xlinker /natvis:"%~dp0\src\natvis\base.natvis"
 set cl_out=        /out: