diff --git a/postfix-3.5.9-glibc-234-build-fix.patch b/postfix-3.5.9-glibc-234-build-fix.patch
index b678b78..5fb9aeb 100644
--- a/postfix-3.5.9-glibc-234-build-fix.patch
+++ b/postfix-3.5.9-glibc-234-build-fix.patch
@@ -2,13 +2,11 @@ diff --git a/src/util/sys_defs.h b/src/util/sys_defs.h
 index 99bec9b..95c78ec 100644
 --- a/src/util/sys_defs.h
 +++ b/src/util/sys_defs.h
-@@ -802,6 +803,9 @@ extern int initgroups(const char *, int);
+@@ -802,6 +803,7 @@ extern int initgroups(const char *, int);
  #define _PATH_PROCNET_IFINET6 "/proc/net/if_inet6"
  #endif
  #endif
-+#if HAVE_GLIBC_API_VERSION_SUPPORT(2, 34)
 +#define HAS_CLOSEFROM
-+#endif
  #include <linux/version.h>
  #if !defined(KERNEL_VERSION)
  #define KERNEL_VERSION(a,b,c) (LINUX_VERSION_CODE + 1)
diff --git a/postfix.spec b/postfix.spec
index 8136251..a8488fd 100644
--- a/postfix.spec
+++ b/postfix.spec
@@ -94,7 +94,9 @@ Patch9: pflogsumm-1.1.5-datecalc.patch
 # rhbz#1384871, sent upstream
 Patch10: pflogsumm-1.1.5-ipv6-warnings-fix.patch
 Patch11: postfix-3.4.4-chroot-example-fix.patch
-# upstream patch
+# unconditional glibc-2.34 API assumption, because it seems
+# in RHEL-9 this feature was also backported to 2.33,
+# upstream uses conditional check for 2.34 API
 Patch12: postfix-3.5.9-glibc-234-build-fix.patch
 
 # Optional patches - set the appropriate environment variables to include