diff --git a/qemu-arm/main.c b/qemu-arm/main.c
index 1673c82afd..0507744126 100644
--- a/qemu-arm/main.c
+++ b/qemu-arm/main.c
@@ -27,7 +27,7 @@ void do_str(const char *src) {
         nlr_pop();
     } else {
         // uncaught exception
-        mp_obj_print_exception(&mp_extern_printf_wrapper, (mp_obj_t)nlr.ret_val);
+        mp_obj_print_exception(&mp_plat_print, (mp_obj_t)nlr.ret_val);
     }
 }
 
diff --git a/qemu-arm/test_main.c b/qemu-arm/test_main.c
index a529133532..1d699d3e25 100644
--- a/qemu-arm/test_main.c
+++ b/qemu-arm/test_main.c
@@ -38,7 +38,7 @@ inline void do_str(const char *src) {
             tinytest_set_test_skipped_();
             return;
         }
-        mp_obj_print_exception(&mp_extern_printf_wrapper, exc);
+        mp_obj_print_exception(&mp_plat_print, exc);
         tt_abort_msg("Uncaught exception");
     }
 end: