diff --git a/CUDA/options/options.h b/CUDA/options/options.h
index 90a240e81d028033b43e91e1073c0e6aa8442738..a3bcff130c7f4d88869becef593afebccbab7498 100644
--- a/CUDA/options/options.h
+++ b/CUDA/options/options.h
@@ -1,6 +1,7 @@
 #define MAXNFIBRES 4 
-#define MAXNPARAMS 15
-//NFIBRES*3 + S0 + d + d_std + f0 + rician = 15
+#define MAXNPARAMS 16
+//MAXNFIBRES*3 + S0 + d + d_std + f0 = 16
+//rician only in runmcmc and doesn't use MAXNPARAMS
 #define MAXNDIR 640
 //640 gradient directions
 #define THREADS_BLOCK_MCMC 64