diff --git a/common/eqemu_logsys.h b/common/eqemu_logsys.h
index 2d70da207..11a69d59f 100644
--- a/common/eqemu_logsys.h
+++ b/common/eqemu_logsys.h
@@ -34,7 +34,7 @@
 #endif
 
 //#define FMT_HEADER_ONLY
-#undef FMT_HEADER_ONLY
+#define FMT_HEADER_ONLY 1
 #include <fmt/core.h>
 #include "types.h"