--- src/c/main.d.orig	2020-04-24 04:54:52.000000000 -0600
+++ src/c/main.d	2020-07-01 13:38:14.196114293 -0600
@@ -83,7 +83,11 @@ cl_fixnum ecl_option_values[ECL_OPT_LIMI
   1,              /* ECL_OPT_TRAP_SIGBUS */
   1,              /* ECL_OPT_TRAP_SIGPIPE */
   1,              /* ECL_OPT_TRAP_INTERRUPT_SIGNAL */
+#ifdef GBC_BOEHM_GENGC
+  0,              /* ECL_OPT_SIGNAL_HANDLING_THREAD */
+#else
   1,              /* ECL_OPT_SIGNAL_HANDLING_THREAD */
+#endif
   16,             /* ECL_OPT_SIGNAL_QUEUE_SIZE */
   0,              /* ECL_OPT_BOOTED */
   8192,           /* ECL_OPT_BIND_STACK_SIZE */
@@ -509,9 +513,9 @@ cl_boot(int argc, char **argv)
     return 1;
   }
 
-  /*ecl_set_option(ECL_OPT_SIGNAL_HANDLING_THREAD, 0);*/
-
-#if !defined(GBC_BOEHM)
+#if defined(GBC_BOEHM)
+  ecl_set_option(ECL_OPT_SIGNAL_HANDLING_THREAD, 0);
+#else
   setbuf(stdin,  stdin_buf);
   setbuf(stdout, stdout_buf);
 #endif