diff --git a/intltool/PKGBUILD b/intltool/PKGBUILD
index 79a824166a..4e680c5733 100644
--- a/intltool/PKGBUILD
+++ b/intltool/PKGBUILD
@@ -3,7 +3,7 @@
 
 pkgname=intltool
 pkgver=0.51.0
-pkgrel=5
+pkgrel=6
 pkgdesc="The internationalization tool collection"
 arch=('any')
 url="https://launchpad.net/intltool"
@@ -12,12 +12,14 @@ depends=('perl-xml-parser')
 source=(https://launchpad.net/intltool/trunk/${pkgver}/+download/${pkgname}-${pkgver}.tar.gz{,.asc}
         intltool-0.51.0-perl-5.26.patch
         intltool-merge-Create-cache-file-atomically.patch
-        intltool_distcheck-fix.patch)
+        intltool_distcheck-fix.patch
+        intltool-fixrace.patch)
 sha256sums=('67c74d94196b153b774ab9f89b2fa6c6ba79352407037c8c14d5aeb334e959cd'
             'SKIP'
             '458f5d53ac358810879080f69b11649901babcacc14471c243eb850e9436d546'
             '13bd6deb65dc94933f132919d4eea4c24354d7c1c1c9e5930cb6e70c75703763'
-            '58cb7d60796bc69c7d0865f106feb589d0271619e62f8741bff6f5ce1a2615ff')
+            '58cb7d60796bc69c7d0865f106feb589d0271619e62f8741bff6f5ce1a2615ff'
+            '5c453ccb8bfe6e0b05d7a55e66dcfa793ea81d9bbe9fdc41f668326ba9310deb')
 validpgpkeys=('9EBD001680E8C8F9FAC61A9BE1A701D4C9DE75B5')
 
 prepare() {
@@ -25,6 +27,7 @@ prepare() {
   patch -Np1 -i ../intltool-0.51.0-perl-5.26.patch
   patch -Np1 -i ../intltool-merge-Create-cache-file-atomically.patch
   patch -Np1 -i ../intltool_distcheck-fix.patch
+  patch -Np1 -i ../intltool-fixrace.patch # https://bugs.launchpad.net/intltool/+bug/1687644
 }
 
 build() {
diff --git a/intltool/intltool-fixrace.patch b/intltool/intltool-fixrace.patch
new file mode 100644
index 0000000000..b1cf59a903
--- /dev/null
+++ b/intltool/intltool-fixrace.patch
@@ -0,0 +1,43 @@
+From: Bernhard M. Wiedemann <bmwiedemann+intltool@suse.de>
+
+avoid a race where some processes try to use a partial cache file
+that is still being written to.
+Note that we release the lock before load_cache,
+because if we got the lock, the cache is already completely written
+and it is OK to have multiple parallel readers
+
+Index: intltool-0.51.0/intltool-merge.in
+===================================================================
+--- intltool-0.51.0.orig/intltool-merge.in
++++ intltool-0.51.0/intltool-merge.in
+@@ -43,6 +43,7 @@ use Getopt::Long;
+ use Text::Wrap;
+ use File::Basename;
+ use Encode;
++use Fcntl qw(:flock);
+ 
+ my $must_end_tag      = -1;
+ my $last_depth        = -1;
+@@ -392,11 +393,14 @@ sub load_cache
+ 
+ sub get_cached_translation_database
+ {
++    open(my $lockfh, ">", "$cache_file.lock") or die $!;
++    flock($lockfh, LOCK_EX) or die "Could not lock '$cache_file.lock' - $!";
+     my $cache_file_age = -M $cache_file;
+     if (defined $cache_file_age) 
+     {
+         if ($cache_file_age <= &get_newest_po_age) 
+         {
++            close($lockfh);
+             &load_cache;
+             return;
+         }
+@@ -404,6 +408,7 @@ sub get_cached_translation_database
+     }
+ 
+     &create_cache;
++    close($lockfh);
+ }
+ 
+ sub add_translation