diff --git a/winsup/cygwin/common.din b/winsup/cygwin/common.din
index 8c9af216b..6cbb012fc 100644
--- a/winsup/cygwin/common.din
+++ b/winsup/cygwin/common.din
@@ -1437,6 +1437,8 @@ timer_gettime SIGFE
 timer_settime SIGFE
 times SIGFE
 timezone SIGFE
+timingsafe_bcmp NOSIGFE
+timingsafe_memcmp NOSIGFE
 tmpfile SIGFE
 tmpnam SIGFE
 toascii NOSIGFE
diff --git a/winsup/cygwin/include/cygwin/version.h b/winsup/cygwin/include/cygwin/version.h
index b647ae91c..308bc8b0f 100644
--- a/winsup/cygwin/include/cygwin/version.h
+++ b/winsup/cygwin/include/cygwin/version.h
@@ -471,12 +471,13 @@ details. */
   304: Export strerror_l, strptime_l, wcsftime_l.
   305: [f]pathconf flag _PC_CASE_INSENSITIVE added.
   306: Export getentropy, getrandom.
+  307: Export timingsafe_bcmp, timingsafe_memcmp.
 
   Note that we forgot to bump the api for ualarm, strtoll, strtoull,
   sigaltstack, sethostname. */
 
 #define CYGWIN_VERSION_API_MAJOR 0
-#define CYGWIN_VERSION_API_MINOR 306
+#define CYGWIN_VERSION_API_MINOR 307
 
 /* There is also a compatibity version number associated with the shared memory
    regions.  It is incremented when incompatible changes are made to the shared
diff --git a/winsup/cygwin/release/2.7.1 b/winsup/cygwin/release/2.7.1
index 9657e1d5c..227d7a2a8 100644
--- a/winsup/cygwin/release/2.7.1
+++ b/winsup/cygwin/release/2.7.1
@@ -1,6 +1,7 @@
 What's new:
 -----------
 
+- New API: timingsafe_bcmp, timingsafe_memcmp
 
 What changed:
 -------------
diff --git a/winsup/doc/posix.xml b/winsup/doc/posix.xml
index e80da4d0d..fac32b771 100644
--- a/winsup/doc/posix.xml
+++ b/winsup/doc/posix.xml
@@ -1232,6 +1232,8 @@ also IEEE Std 1003.1-2008 (POSIX.1-2008).</para>
     strlcat
     strlcpy
     strsep
+    timingsafe_bcmp
+    timingsafe_memcmp
     updwtmp
     valloc
     verr