diff --git a/crypto/cast6_generic.c b/crypto/cast6_generic.c
index dc9309d70405..1acd2f1c48fc 100644
--- a/crypto/cast6_generic.c
+++ b/crypto/cast6_generic.c
@@ -370,7 +370,7 @@ static const u8 Tr[4][8] = {
 };
 
 /* forward octave */
-static void W(u32 *key, unsigned int i)
+static inline void W(u32 *key, unsigned int i)
 {
 	u32 I;
 	key[6] ^= F1(key[7], Tr[i % 4][0], Tm[i][0]);
@@ -434,7 +434,7 @@ int cast6_setkey(struct crypto_tfm *tfm, const u8 *key, unsigned int keylen)
 EXPORT_SYMBOL_GPL(cast6_setkey);
 
 /*forward quad round*/
-static void Q(u32 *block, u8 *Kr, u32 *Km)
+static inline void Q(u32 *block, u8 *Kr, u32 *Km)
 {
 	u32 I;
 	block[2] ^= F1(block[3], Kr[0], Km[0]);
@@ -444,7 +444,7 @@ static void Q(u32 *block, u8 *Kr, u32 *Km)
 }
 
 /*reverse quad round*/
-static void QBAR(u32 *block, u8 *Kr, u32 *Km)
+static inline void QBAR(u32 *block, u8 *Kr, u32 *Km)
 {
 	u32 I;
 	block[3] ^= F1(block[0], Kr[3], Km[3]);