diff --git a/build.bat b/build.bat
index 3513251e..d3a3f453 100644
--- a/build.bat
+++ b/build.bat
@@ -67,7 +67,7 @@ if "%pgo%"=="1" (
 set cl_common=     /I..\src\ /I..\local\ /nologo /FC /Z7
 set cl_debug=      call cl /Od /Ob1 /DBUILD_DEBUG=1 %cl_common% %auto_compile_flags%
 set cl_release=    call cl /O2 /DBUILD_DEBUG=0 %cl_common% %auto_compile_flags%
-set cl_link=       /link /MANIFEST:EMBED /INCREMENTAL:NO /pdbaltpath:%%%%_PDB%%%% /NATVIS:"%~dp0\src\natvis\base.natvis" /noexp /nocoffgrpinfo
+set cl_link=       /link /MANIFEST:EMBED /INCREMENTAL:NO /pdbaltpath:%%%%_PDB%%%% /NATVIS:"%~dp0\src\natvis\base.natvis" /noexp /nocoffgrpinfo /opt:ref /opt:icf
 set cl_out=        /out:
 set cl_linker=     
 set clang_common=  -I..\src\ -I..\local\ -gcodeview -fdiagnostics-absolute-paths -Wall -Wno-unknown-warning-option -Wno-missing-braces -Wno-unused-function -Wno-unused-parameter -Wno-writable-strings -Wno-missing-field-initializers -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 -Wno-compare-distinct-pointer-types -Wno-initializer-overrides -Wno-incompatible-pointer-types-discards-qualifiers -Xclang -flto-visibility-public-std -D_USE_MATH_DEFINES -Dstrdup=_strdup -Dgnu_printf=printf -ferror-limit=10000 -mcx16
@@ -168,4 +168,3 @@ if "%pgo_run%"=="1" (
   )
   call %0 %*
 )
-