diff --git a/scripts/build_clang_multiarch_win_x64.bat b/scripts/build_clang_multiarch_win_x64.bat
index c96a8f9a..85c59976 100644
--- a/scripts/build_clang_multiarch_win_x64.bat
+++ b/scripts/build_clang_multiarch_win_x64.bat
@@ -1 +1 @@
-clang++ -I../include -O3 -DNDEBUG -DENABLE_MULTIARCH_x86_POPCNT -DENABLE_MULTIARCH_AVX512_VBMI2 ../src/*.cpp ../src/x86/*.cpp ../src/app/*.cpp -o primesieve.exe "C:\Program Files\LLVM\lib\clang\18\lib\windows\clang_rt.builtins-x86_64.lib"
+clang++ -I../include -O3 -mpopcnt -DNDEBUG -DENABLE_MULTIARCH_AVX512_VBMI2 ../src/*.cpp ../src/x86/*.cpp ../src/app/*.cpp -o primesieve.exe "C:\Program Files\LLVM\lib\clang\18\lib\windows\clang_rt.builtins-x86_64.lib"
diff --git a/scripts/build_mingw64_x64.sh b/scripts/build_mingw64_x64.sh
index c219e09d..187f24ff 100755
--- a/scripts/build_mingw64_x64.sh
+++ b/scripts/build_mingw64_x64.sh
@@ -45,7 +45,7 @@ git pull
 mkdir build-release
 cd build-release
 
-g++ -static -O3 -flto -DNDEBUG -D_WIN32_WINNT=0x0A00 -Wall -Wextra -pedantic -I ../include ../src/*.cpp ../src/app/*.cpp -o primesieve.exe
+g++ -static -O3 -mpopcnt -flto -DNDEBUG -D_WIN32_WINNT=0x0A00 -Wall -Wextra -pedantic -DENABLE_MULTIARCH_AVX512_VBMI2 -I ../include ../src/*.cpp ../src/x86/*.cpp ../src/app/*.cpp -o primesieve.exe
 strip primesieve.exe
 
 # Create a release zip archive