diff --git a/lib/master.c b/lib/master.c
index 4125c3d6..a510b360 100644
--- a/lib/master.c
+++ b/lib/master.c
@@ -381,7 +381,7 @@ int ecrt_master_activate(ec_master_t *master)
         }
 
         // Access the mapped region to cause the initial page fault
-        printf("pd: %x\n", master->process_data[0]);
+        memset(master->process_data, 0, master->process_data_size);
     }
 
     return 0;