diff --git a/C/c_interface.c b/C/c_interface.c
index e183d5d8e..713a61182 100755
--- a/C/c_interface.c
+++ b/C/c_interface.c
@@ -2421,6 +2421,8 @@ YAP_RunGoalOnce(Term t)
   Int oldPrologMode = LOCAL_PrologMode;
 
   BACKUP_MACHINE_REGS();
+  Yap_InitYaamRegs( 0 );
+  
   LOCAL_PrologMode = UserMode;
   //  Yap_heap_regs->yap_do_low_level_trace=true;
   out = Yap_RunTopGoal(t);