diff --git a/fish.nix b/fish.nix
index 583d74d..45dc15a 100644
--- a/fish.nix
+++ b/fish.nix
@@ -111,6 +111,7 @@
       m = "meson";
       n = "ninja";
       gdb_asan = "gdb -tui -ex='break __asan::ReportGenericError'";
+      gdb_ubsan = "gdb -tui -ex='break __ubsan::ScopedReport::~ScopedReport'";
     };
 
     plugins = [