diff --git a/perl-5.31.2-include-a-trailing-0-in-SVs-holding-trie-info.patch b/perl-5.31.2-include-a-trailing-0-in-SVs-holding-trie-info.patch
new file mode 100644
index 0000000..9291dff
--- /dev/null
+++ b/perl-5.31.2-include-a-trailing-0-in-SVs-holding-trie-info.patch
@@ -0,0 +1,37 @@
+From 1d84a25665013f389ffc6fad7dd133f1c6287a08 Mon Sep 17 00:00:00 2001
+From: David Mitchell <davem@iabyn.com>
+Date: Tue, 6 Aug 2019 14:36:45 +0100
+Subject: [PATCH] include a trailing \0 in SVs holding trie info
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+RT #13427
+
+TRIE_STORE_REVCHAR() was creating SvPV()s with no trailing '\0'. This
+doesn't really matter given the specialised use these are put to, but
+it upset valgrind et al when perl was run with -Drv which printf("%s")'s
+the contents of the string.
+
+Signed-off-by: Petr Písař <ppisar@redhat.com>
+---
+ regcomp.c | 3 ++-
+ 1 file changed, 2 insertions(+), 1 deletion(-)
+
+diff --git a/regcomp.c b/regcomp.c
+index 370221f72e..1117998fc8 100644
+--- a/regcomp.c
++++ b/regcomp.c
+@@ -2526,7 +2526,8 @@ is the recommended Unicode-aware way of saying
+ 	if (UTF) {							   \
+             SV *zlopp = newSV(UTF8_MAXBYTES);				   \
+ 	    unsigned char *flrbbbbb = (unsigned char *) SvPVX(zlopp);	   \
+-            unsigned const char *const kapow = uvchr_to_utf8(flrbbbbb, val); \
++            unsigned char *const kapow = uvchr_to_utf8(flrbbbbb, val);     \
++            *kapow = '\0';                                                 \
+ 	    SvCUR_set(zlopp, kapow - flrbbbbb);				   \
+ 	    SvPOK_on(zlopp);						   \
+ 	    SvUTF8_on(zlopp);						   \
+-- 
+2.20.1
+
diff --git a/perl.spec b/perl.spec
index 7c0106e..161d086 100644
--- a/perl.spec
+++ b/perl.spec
@@ -235,6 +235,10 @@ Patch44:        perl-5.31.1-perl-134221-support-O_APPEND-for-open-.-undef-on-VMS
 # fixed after 5.31.2
 Patch45:        perl-5.31.2-perl-134291-propagate-non-PVs-in-in-bare-die.patch
 
+# Include trailing zero in scalars holding trie data, RT#134207,
+# fixed after 5.31.2
+Patch46:        perl-5.31.2-include-a-trailing-0-in-SVs-holding-trie-info.patch
+
 # Link XS modules to libperl.so with EU::CBuilder on Linux, bug #960048
 Patch200:       perl-5.16.3-Link-XS-modules-to-libperl.so-with-EU-CBuilder-on-Li.patch
 
@@ -2802,6 +2806,7 @@ Perl extension for Version Objects
 %patch43 -p1
 %patch44 -p1
 %patch45 -p1
+%patch46 -p1
 %patch200 -p1
 %patch201 -p1
 
@@ -2854,6 +2859,7 @@ perl -x patchlevel.h \
     'Fedora Patch43: Preserve append mode when opening anonymous files (RT#134221)' \
     'Fedora Patch44: Preserve append mode when opening anonymous files (RT#134221)' \
     'Fedora Patch45: Fix propagating non-string variables in an exception value (RT#134291)' \
+    'Fedora Patch46: Include trailing zero in scalars holding trie data (RT#134207)' \
     'Fedora Patch200: Link XS modules to libperl.so with EU::CBuilder on Linux' \
     'Fedora Patch201: Link XS modules to libperl.so with EU::MM on Linux' \
     %{nil}
@@ -5101,6 +5107,7 @@ popd
 %changelog
 * Wed Aug 07 2019 Petr Pisar <ppisar@redhat.com> - 4:5.30.0-443
 - Fix propagating non-string variables in an exception value (RT#134291)
+- Include trailing zero in scalars holding trie data (RT#134207)
 
 * Fri Jul 26 2019 Fedora Release Engineering <releng@fedoraproject.org> - 4:5.30.0-442
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_31_Mass_Rebuild