diff --git a/zephyr/main.c b/zephyr/main.c
index 61de6e168e6f171bd68e2d4b13ca87501f40db81..25bd88f7688bd307e68b0f147dd093c6cb3f0f6e 100644
--- a/zephyr/main.c
+++ b/zephyr/main.c
@@ -146,10 +146,6 @@ NORETURN void nlr_jump_fail(void *val) {
     while (1);
 }
 
-void NORETURN __fatal_error(const char *msg) {
-    while (1);
-}
-
 #ifndef NDEBUG
 void MP_WEAK __assert_func(const char *file, int line, const char *func, const char *expr) {
     printf("Assertion '%s' failed, at file %s:%d\n", expr, file, line);