diff --git a/package/uclibc/uclibc.mk b/package/uclibc/uclibc.mk
index 600d72ce7b..16b693bdb5 100644
--- a/package/uclibc/uclibc.mk
+++ b/package/uclibc/uclibc.mk
@@ -72,6 +72,15 @@ define UCLIBC_BINFMT_CONFIG
 endef
 endif
 
+#
+# 64-bit time_t is enabled by default but needs headers >= 5.1.0
+#
+ifeq ($(BR2_TOOLCHAIN_HEADERS_AT_LEAST_5_1),)
+define UCLIBC_DISABLE_TIME64
+	$(call KCONFIG_DISABLE_OPT,UCLIBC_USE_TIME64)
+endef
+endif
+
 #
 # AArch64 definitions
 #
@@ -398,6 +407,7 @@ define UCLIBC_KCONFIG_FIXUP_CMDS
 	$(call KCONFIG_DISABLE_OPT,DOSTRIP)
 	$(UCLIBC_MMU_CONFIG)
 	$(UCLIBC_BINFMT_CONFIG)
+	$(UCLIBC_DISABLE_TIME64)
 	$(UCLIBC_AARCH64_PAGE_SIZE_CONFIG)
 	$(UCLIBC_ARC_PAGE_SIZE_CONFIG)
 	$(UCLIBC_ARC_ATOMICS_CONFIG)