diff --git a/curl.spec b/curl.spec
index 0bba198563e97313d2e8b1e5f8a9ba16d424b3f9..50a9333a7d01faf48168da1fab5843bbb7dfa8d4 100644
--- a/curl.spec
+++ b/curl.spec
@@ -7,7 +7,7 @@
 
 Name:           curl
 Version:        8.4.0
-Release:        19
+Release:        20
 Summary:        Curl is used in command lines or scripts to transfer data
 License:        curl
 URL:            https://curl.se/
@@ -120,6 +120,8 @@ aclocal -I m4
 automake
 
 install -d build-full
+# set ac_cv_func_fork to pass enable ntlm-wb check
+export ac_cv_func_fork=yes
 export common_configure_opts="--cache-file=../config.cache \
     --enable-hsts --enable-ipv6 --enable-symbol-hiding --enable-threaded-resolver \
     --without-zstd --with-gssapi --with-libidn2 --with-nghttp2 --with-ssl \
@@ -239,6 +241,12 @@ rm -rf ${RPM_BUILD_ROOT}%{_libdir}/libcurl.la
 %{_mandir}/man3/*
 
 %changelog
+* Mon Aug 04 2025 xingwei <xingwei14@h-partners.com> - 8.4.0-20
+- Type:bugfix
+- CVE:NA
+- SUG:NA
+- DESC:set ac_cv_func_fork to pass enable ntlm-wb check
+
 * Mon Jul 28 2025 xinghe <xinghe2@h-partners.com> - 8.4.0-19
 - Type:bugfix
 - CVE:NA