diff --git a/lib/stan_math b/lib/stan_math
index 49ead11e2c9..20224ff479c 160000
--- a/lib/stan_math
+++ b/lib/stan_math
@@ -1 +1 @@
-Subproject commit 49ead11e2c92be7fadd9738a5c7f99ef3af9cb3b
+Subproject commit 20224ff479ca557a82a7ea3c5446d301a7d85825