diff --git a/Objects/unicodeobject.c b/Objects/unicodeobject.c
index 06c8fc3..7043d5f 100644
--- a/Objects/unicodeobject.c
+++ b/Objects/unicodeobject.c
@@ -4533,6 +4533,7 @@
 }
 
 #define STRINGLIB_EMPTY unicode_empty
+#define FROM_UNICODE
 
 #include "stringlib/fastsearch.h"