diff --git a/sys/mips/conf/AR933X_BASE b/sys/mips/conf/AR933X_BASE
index b0124a9ff73..d47c2dbdd8e 100644
--- a/sys/mips/conf/AR933X_BASE
+++ b/sys/mips/conf/AR933X_BASE
@@ -45,7 +45,7 @@ options 	NO_SYSCTL_DESCR
 options		NBUF=128
 
 # Limit UMTX hash size
-options		UMTX_NUM_CHAINS=64
+# options		UMTX_NUM_CHAINS=64
 
 # PMC
 #options		HWPMC_HOOKS