diff --git a/src/lib/fmt/ToBuffer.hxx b/src/lib/fmt/ToBuffer.hxx
index a423e4aad..8d711fa25 100644
--- a/src/lib/fmt/ToBuffer.hxx
+++ b/src/lib/fmt/ToBuffer.hxx
@@ -32,7 +32,7 @@
 #include "util/StringBuffer.hxx"
 
 #include <fmt/core.h>
-#if FMT_VERSION <= 80000
+#if FMT_VERSION < 90000
 #include <fmt/format.h> // for the fmt::buffer::flush() implementation
 #endif