diff --git a/mpy-cross/mpconfigport.h b/mpy-cross/mpconfigport.h
index 9c23257260..ee7f98e69d 100644
--- a/mpy-cross/mpconfigport.h
+++ b/mpy-cross/mpconfigport.h
@@ -79,6 +79,7 @@
 #define MICROPY_USE_INTERNAL_PRINTF (0)
 
 #define MICROPY_PY_FSTRINGS         (1)
+#define MICROPY_PY_TSTRINGS         (1)
 #define MICROPY_PY_BUILTINS_STR_UNICODE (1)
 
 #if !(defined(MICROPY_GCREGS_SETJMP) || defined(__x86_64__) || defined(__i386__) || defined(__thumb2__) || defined(__thumb__) || defined(__arm__))