From 789aa69e0a09d6b005ee8b2ae5ddd249daffe5ce Mon Sep 17 00:00:00 2001
From: marcel-behlau-elfin
 <45554252+marcel-behlau-elfin@users.noreply.github.com>
Date: Tue, 9 Dec 2025 21:38:28 +0100
Subject: [PATCH] fix: add missing operator (#4627)

---
 include/fmt/base.h | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/include/fmt/base.h b/include/fmt/base.h
index d4847834..23c76dac 100644
--- a/include/fmt/base.h
+++ b/include/fmt/base.h
@@ -930,6 +930,9 @@ class locale_ref {
   }
 
   inline explicit operator bool() const noexcept { return locale_ != nullptr; }
+#else
+ public:
+  inline explicit operator bool() const noexcept { return false; }
 #endif  // FMT_USE_LOCALE
 
  public: