diff --git a/linux/linux.mk b/linux/linux.mk
index 7e826ccdf0..e75dcaa60d 100644
--- a/linux/linux.mk
+++ b/linux/linux.mk
@@ -99,7 +99,7 @@ LINUX_MAKE_ENV += \
 	KBUILD_BUILD_VERSION=1 \
 	KBUILD_BUILD_USER=buildroot \
 	KBUILD_BUILD_HOST=buildroot \
-	KBUILD_BUILD_TIMESTAMP="$(shell date -d @$(SOURCE_DATE_EPOCH))"
+	KBUILD_BUILD_TIMESTAMP="$(shell LC_ALL=C date -d @$(SOURCE_DATE_EPOCH))"
 endif
 
 # Get the real Linux version, which tells us where kernel modules are