diff --git a/include/spdlog/fmt/fmt.h b/include/spdlog/fmt/fmt.h
index b853fd5e..1e8320c9 100644
--- a/include/spdlog/fmt/fmt.h
+++ b/include/spdlog/fmt/fmt.h
@@ -5,6 +5,10 @@
 
 #pragma once
 
+// fmt 7.0.0 renamed the internal namespace to detail
+// The former is still provided as an alias if the FMT_USE_INTERNAL macro is defined.
+#define FMT_USE_INTERNAL
+
 //
 // Include a bundled header-only copy of fmtlib or an external one.
 // By default spdlog include its own copy.
@@ -22,4 +26,4 @@
 #else // SPDLOG_FMT_EXTERNAL is defined - use external fmtlib
 #include <fmt/core.h>
 #include <fmt/format.h>
-#endif
\ No newline at end of file
+#endif