diff --git a/src/binary_c_parameters.h b/src/binary_c_parameters.h
index 781e34b7e7fe660a1fc01ce88b1ee50efd112bd5..1281c9647e654728f8faa50adce36499eba6ba3e 100644
--- a/src/binary_c_parameters.h
+++ b/src/binary_c_parameters.h
@@ -1399,7 +1399,7 @@
  * see nucsyn/nucsyn.h for details of parts you can switch on 
  * off.
  ************************************************************/
-//#define NUCSYN
+#define NUCSYN
 
 /************************************************************
  * Stellar colour library
diff --git a/src/nucsyn/nucsyn_parameters.h b/src/nucsyn/nucsyn_parameters.h
index c53527665d7ed88e43bd2fcb418a69eb38462366..0b67abc82d463c04c7c6059f572219758b8ce0dd 100644
--- a/src/nucsyn/nucsyn_parameters.h
+++ b/src/nucsyn/nucsyn_parameters.h
@@ -740,7 +740,7 @@ undances with s-process
 /* define NUCSYN_GCE to modify yield output for gce.pl
  * NB this just activates other defines, and turns some off.
  */
-#define NUCSYN_GCE
+//#define NUCSYN_GCE
 
 #ifdef NUCSYN_GCE