diff --git a/package/ntp/0002-ntp-syscalls-fallback.patch b/package/ntp/0002-ntp-syscalls-fallback.patch
index 535fc93dfd..46704b9d3f 100644
--- a/package/ntp/0002-ntp-syscalls-fallback.patch
+++ b/package/ntp/0002-ntp-syscalls-fallback.patch
@@ -8,10 +8,11 @@ Signed-off-by: James Knight <james.knight@rockwellcollins.com>
  configure.ac | 4 ++--
  1 file changed, 2 insertions(+), 2 deletions(-)
 
-diff --git a/configure.ac b/configure.ac
---- a/configure.ac
-+++ b/configure.ac
-@@ -1523,11 +1523,11 @@ AC_CACHE_CHECK(
+Index: ntp-4.2.8p17/configure.ac
+===================================================================
+--- ntp-4.2.8p17.orig/configure.ac
++++ ntp-4.2.8p17/configure.ac
+@@ -1472,11 +1472,11 @@ AC_CACHE_CHECK(
      [ntp_cv_var_ntp_syscalls],
      [
  	ntp_cv_var_ntp_syscalls=no
diff --git a/package/ntp/0003-fix-pthread-detach-check.patch b/package/ntp/0003-fix-pthread-detach-check.patch
new file mode 100644
index 0000000000..894b422f2c
--- /dev/null
+++ b/package/ntp/0003-fix-pthread-detach-check.patch
@@ -0,0 +1,26 @@
+fix pthread_detach check
+
+Upstream: https://bugs.ntp.org/show_bug.cgi?id=3926
+
+Signed-off-by: Yegor Yefremov <yegorslists@googlemail.com>
+---
+ sntp/m4/openldap-thread-check.m4 |    6 ++----
+ 1 file changed, 2 insertions(+), 4 deletions(-)
+
+Index: ntp-4.2.8p17/sntp/m4/openldap-thread-check.m4
+===================================================================
+--- ntp-4.2.8p17.orig/sntp/m4/openldap-thread-check.m4
++++ ntp-4.2.8p17/sntp/m4/openldap-thread-check.m4
+@@ -262,10 +262,8 @@ pthread_rwlock_t rwlock;
+ 				dnl save the flags
+ 				AC_LINK_IFELSE([AC_LANG_PROGRAM([[
+ #include <pthread.h>
+-#ifndef NULL
+-#define NULL (void*)0
+-#endif
+-]], [[pthread_detach(NULL);]])],[ol_cv_func_pthread_detach=yes],[ol_cv_func_pthread_detach=no])
++pthread_t thread;
++]], [[pthread_detach(thread);]])],[ol_cv_func_pthread_detach=yes],[ol_cv_func_pthread_detach=no])
+ 			])
+
+ 			if test $ol_cv_func_pthread_detach = no ; then