diff --git a/matlab/independent_metropolis_hastings_core.m b/matlab/independent_metropolis_hastings_core.m
index 5b7b1bd58..1feafc0fd 100644
--- a/matlab/independent_metropolis_hastings_core.m
+++ b/matlab/independent_metropolis_hastings_core.m
@@ -64,7 +64,7 @@ varargin=myinputs.varargin;
 if whoiam
     Parallel=myinputs.Parallel;
     % initialize persistent variables in priordens()
-    priordens(xparam1,bayestopt_.pshape,bayestopt_.p6,bayestopt_.p7, ...
+    priordens(xparam1',bayestopt_.pshape,bayestopt_.p6,bayestopt_.p7, ...
         bayestopt_.p3,bayestopt_.p4,1);
 end