diff --git a/Makefile b/Makefile
index a58a5cd..125baa3 100644
--- a/Makefile
+++ b/Makefile
@@ -578,6 +578,9 @@ KBUILD_AFLAGS += -Wa,-gstabs,-S
 endif
 endif
 
+# Prohibit date/time macros, which would make the build non-deterministic
+KBUILD_CFLAGS   += $(call cc-option,-Werror=date-time)
+
 ifneq ($(CONFIG_SYS_TEXT_BASE),)
 KBUILD_CPPFLAGS += -DCONFIG_SYS_TEXT_BASE=$(CONFIG_SYS_TEXT_BASE)
 endif