diff --git a/gdbinit b/gdbinit
index fdc9c759b..b15f85a90 100644
--- a/gdbinit
+++ b/gdbinit
@@ -200,5 +200,5 @@ define inst
 end
 
 define gbt
-  call scm_display_backtrace (scm_make_stack(0x404,0x304), scm_current_error_port (), 0x704, 0x704, 0x704)
+  call scm_display_backtrace (scm_make_stack(0x404,0x304), scm_current_error_port (), 0x904, 0x904)
 end