diff --git a/0067-curl-7.61.1-ntlm-force-http-1-1.patch b/0067-curl-7.61.1-ntlm-force-http-1-1.patch
index 2ddace4..3c11667 100644
--- a/0067-curl-7.61.1-ntlm-force-http-1-1.patch
+++ b/0067-curl-7.61.1-ntlm-force-http-1-1.patch
@@ -30,9 +30,9 @@ index aed7aa80f..7be6f8b92 100644
        data->state.authproblem = TRUE;
 +    if(data->state.authhost.picked == CURLAUTH_NTLM &&
 +       conn->httpversion > 11) {
-+      infof(data, "Forcing HTTP/1.1 for NTLM");
-+      connclose(conn, "Force HTTP/1.1 connection");
-+      conn->data->set.httpversion = CURL_HTTP_VERSION_1_1;
++      infof(data, "Forcing HTTP/1.x for NTLM");
++      connclose(conn, "Force HTTP/1.x connection");
++      conn->data->set.httpversion = CURL_HTTP_VERSION_1_0;
 +    }
    }
    if(conn->bits.proxy_user_passwd &&
diff --git a/curl.spec b/curl.spec
index 8e69a6c..f0fd9bc 100644
--- a/curl.spec
+++ b/curl.spec
@@ -1,7 +1,7 @@
 Summary: A utility for getting files from remote servers (FTP, HTTP, and others)
 Name: curl
 Version: 7.61.1
-Release: 34%{?dist}.11
+Release: 34%{?dist}.12
 License: MIT
 Source: https://curl.haxx.se/download/%{name}-%{version}.tar.xz
 
@@ -611,6 +611,9 @@ rm -f ${RPM_BUILD_ROOT}%{_libdir}/libcurl.la
 %{_libdir}/libcurl.so.4.[0-9].[0-9].minimal
 
 %changelog
+* Tue May 06 2026 Jacek Migacz <jmigacz@redhat.com> - 7.61.1-34.el8_10.12
+- NTLM: use HTTP/1.0 instead of HTTP/1.1 for compatibility (RHEL-171912)
+
 * Tue Jan 13 2026 Jacek Migacz <jmigacz@redhat.com> - 7.61.1-34.el8_10.11
 - noproxy: support proxies specified using cidr notation (RHEL-86910)
 - disable test1456 (requires test framework features not in 7.61.1)