diff --git a/include/fmt/core.h b/include/fmt/core.h
index b5156e20..a72dbb40 100644
--- a/include/fmt/core.h
+++ b/include/fmt/core.h
@@ -1067,6 +1067,8 @@ FMT_CONSTEXPR auto visit_format_arg(Visitor&& vis,
     return vis(arg.value_.pointer);
   case internal::custom_type:
     return vis(typename basic_format_arg<Context>::handle(arg.value_.custom));
+  default:
+    break;
   }
   return vis(monostate());
 }
diff --git a/include/fmt/format.h b/include/fmt/format.h
index bec24906..7f29a578 100644
--- a/include/fmt/format.h
+++ b/include/fmt/format.h
@@ -2347,6 +2347,8 @@ FMT_CONSTEXPR const Char* parse_align(const Char* begin, const Char* end,
     case '^':
       align = align::center;
       break;
+    default:
+      break;
     }
     if (align != align::none) {
       if (i > 0) {
@@ -2427,6 +2429,8 @@ FMT_CONSTEXPR const Char* parse_format_specs(const Char* begin, const Char* end,
     handler.on_space();
     ++begin;
     break;
+  default:
+    break;
   }
   if (begin == end) return begin;