diff --git a/lib/log.h b/lib/log.h
index 980f3ddf4b..7d05b84641 100644
--- a/lib/log.h
+++ b/lib/log.h
@@ -87,7 +87,7 @@ extern void zlog_debug(const char *format, ...) PRINTF_ATTRIBUTE(1, 2);
 
 /* For logs which have error codes associated with them */
 #define flog_err(ferr_id, format, ...)                                        \
-	zlog_err("[EC %d] " format, ferr_id, ##__VA_ARGS__)
+	zlog_err("[EC %"PRIu32"] " format, ferr_id, ##__VA_ARGS__)
 #define flog_err_sys(ferr_id, format, ...)                                     \
 	flog_err(ferr_id, format, ##__VA_ARGS__)