diff --git a/src/mod/win32/dll.c b/src/mod/win32/dll.c
index 2b238b2f5..65386bf78 100644
--- a/src/mod/win32/dll.c
+++ b/src/mod/win32/dll.c
@@ -5,6 +5,7 @@
  */
 #include <windows.h>
 #include <re_types.h>
+#include <re_fmt.h>
 #include "../mod_internal.h"