diff --git a/changelog.d/3877.misc b/changelog.d/3877.misc
new file mode 100644
index 0000000000000000000000000000000000000000..a80fec4bd8a1dbc30f2955fd89410ebd03483df7
--- /dev/null
+++ b/changelog.d/3877.misc
@@ -0,0 +1 @@
+mention jemalloc in the README