diff --git a/contrib/linux-kernel/lib/xxhash.c b/contrib/linux-kernel/lib/xxhash.c
index 43c2c5296..0d301ad86 100644
--- a/contrib/linux-kernel/lib/xxhash.c
+++ b/contrib/linux-kernel/lib/xxhash.c
@@ -165,12 +165,12 @@ XXH_PUBLIC_API unsigned XXH_versionNumber (void) { return XXH_VERSION_NUMBER; }
 /* **************************
 *  Utils
 ****************************/
-XXH_PUBLIC_API void XXH32_copyState(XXH32_state_t* restrict dstState, const XXH32_state_t* restrict srcState)
+XXH_PUBLIC_API void XXH32_copyState(XXH32_state_t* dstState, const XXH32_state_t* srcState)
 {
 	memcpy(dstState, srcState, sizeof(*dstState));
 }
 
-XXH_PUBLIC_API void XXH64_copyState(XXH64_state_t* restrict dstState, const XXH64_state_t* restrict srcState)
+XXH_PUBLIC_API void XXH64_copyState(XXH64_state_t* dstState, const XXH64_state_t* srcState)
 {
 	memcpy(dstState, srcState, sizeof(*dstState));
 }