diff --git a/include/utils/utils.h b/include/utils/utils.h
index dfffe94..3634127 100644
--- a/include/utils/utils.h
+++ b/include/utils/utils.h
@@ -152,6 +152,7 @@ extern "C" {
 #include <zephyr/toolchain.h>  // __weak, __builtin_xxx() etc.,
 
 #define PATH_SEPARATOR          '/'
+#define __noreturn              FUNC_NORETURN
 #define __unreachable()         __builtin_unreachable()
 #define __format_printf(x, y)   __attribute__((format(printf, x, y)))
 
diff --git a/src/utils.c b/src/utils.c
index a4459b5..b02ab68 100644
--- a/src/utils.c
+++ b/src/utils.c
@@ -164,6 +164,9 @@ struct timezone {
 };
 #endif
 
+int gettimeofday(struct timeval * tp, struct timezone * tzp);
+
+#ifndef __ZEPHYR__
 int gettimeofday(struct timeval * tp, struct timezone * tzp)
 {
 	ARG_UNUSED(tzp);
@@ -171,6 +174,7 @@ int gettimeofday(struct timeval * tp, struct timezone * tzp)
 	tp->tv_usec = 0;
 	return 0;
 }
+#endif
 
 int add_iso8601_utc_datetime(char* buf, size_t size) {
 	ARG_UNUSED(buf);