diff --git a/Misc/NEWS.d/next/Tools-Demos/2019-10-08-15-07-52.bpo-38118.pIZD6H.rst b/Misc/NEWS.d/next/Tools-Demos/2019-10-08-15-07-52.bpo-38118.pIZD6H.rst
new file mode 100644
index 00000000000..13adadb0b8f
--- /dev/null
+++ b/Misc/NEWS.d/next/Tools-Demos/2019-10-08-15-07-52.bpo-38118.pIZD6H.rst
@@ -0,0 +1,2 @@
+Update Valgrind suppression file to ignore a false alarm in
+:c:func:`PyUnicode_Decode` when using GCC builtin strcmp().
diff --git a/Misc/valgrind-python.supp b/Misc/valgrind-python.supp
index bc8f77f261a..38a5ea3cd2b 100644
--- a/Misc/valgrind-python.supp
+++ b/Misc/valgrind-python.supp
@@ -283,6 +283,17 @@
    fun:rl_initialize
 }
 
+# Valgrind emits "Conditional jump or move depends on uninitialised value(s)"
+# false alarms on GCC builtin strcmp() function. The GCC code is correct.
+#
+# Valgrind bug: https://bugs.kde.org/show_bug.cgi?id=264936
+{
+   bpo-38118: Valgrind emits false alarm on GCC builtin strcmp()
+   Memcheck:Cond
+   fun:PyUnicode_Decode
+}
+
+
 ###
 ### These occur from somewhere within the SSL, when running
 ###  test_socket_sll.  They are too general to leave on by default.