diff --git a/lib/stan_math b/lib/stan_math
index e1fcbe8dca..8a09048f51 160000
--- a/lib/stan_math
+++ b/lib/stan_math
@@ -1 +1 @@
-Subproject commit e1fcbe8dca2bfa85b1e109b2bfb1cf65fe0363b7
+Subproject commit 8a09048f5187662687e04c14d7737cf4d20a18a1