diff --git a/OpenCL/m13400.cl b/OpenCL/m13400.cl
index 14e699ba9..55a3d7093 100644
--- a/OpenCL/m13400.cl
+++ b/OpenCL/m13400.cl
@@ -700,7 +700,7 @@ __constant u32 rcon[] =
   0x1b000000, 0x36000000,
 };
 
-void AES256_ExpandKey (u32 *userkey, u32 *rek, __local u32 *s_te0, __local u32 *s_te1, __local u32 *s_te2, __local u32 *s_te3, __local u32 *s_te4)
+static void AES256_ExpandKey (u32 *userkey, u32 *rek, __local u32 *s_te0, __local u32 *s_te1, __local u32 *s_te2, __local u32 *s_te3, __local u32 *s_te4)
 {
   rek[0] = userkey[0];
   rek[1] = userkey[1];
@@ -743,7 +743,7 @@ void AES256_ExpandKey (u32 *userkey, u32 *rek, __local u32 *s_te0, __local u32 *
   }
 }
 
-void AES256_InvertKey (u32 *rdk, __local u32 *s_td0, __local u32 *s_td1, __local u32 *s_td2, __local u32 *s_td3, __local u32 *s_td4, __local u32 *s_te0, __local u32 *s_te1, __local u32 *s_te2, __local u32 *s_te3, __local u32 *s_te4)
+static void AES256_InvertKey (u32 *rdk, __local u32 *s_td0, __local u32 *s_td1, __local u32 *s_td2, __local u32 *s_td3, __local u32 *s_td4, __local u32 *s_te0, __local u32 *s_te1, __local u32 *s_te2, __local u32 *s_te3, __local u32 *s_te4)
 {
   #ifdef _unroll
   #pragma unroll
@@ -789,7 +789,7 @@ void AES256_InvertKey (u32 *rdk, __local u32 *s_td0, __local u32 *s_td1, __local
   }
 }
 
-void AES256_decrypt (const u32 *in, u32 *out, const u32 *rdk, __local u32 *s_td0, __local u32 *s_td1, __local u32 *s_td2, __local u32 *s_td3, __local u32 *s_td4)
+static void AES256_decrypt (const u32 *in, u32 *out, const u32 *rdk, __local u32 *s_td0, __local u32 *s_td1, __local u32 *s_td2, __local u32 *s_td3, __local u32 *s_td4)
 {
   u32 s0 = in[0] ^ rdk[0];
   u32 s1 = in[1] ^ rdk[1];
@@ -846,7 +846,7 @@ void AES256_decrypt (const u32 *in, u32 *out, const u32 *rdk, __local u32 *s_td0
          ^ rdk[59];
 }
 
-void AES256_encrypt (const u32 *in, u32 *out, const u32 *rek, __local u32 *s_te0, __local u32 *s_te1, __local u32 *s_te2, __local u32 *s_te3, __local u32 *s_te4)
+static void AES256_encrypt (const u32 *in, u32 *out, const u32 *rek, __local u32 *s_te0, __local u32 *s_te1, __local u32 *s_te2, __local u32 *s_te3, __local u32 *s_te4)
 {
   u32 s0 = in[0] ^ rek[0];
   u32 s1 = in[1] ^ rek[1];
@@ -923,7 +923,7 @@ __constant u32 k_sha256[64] =
   SHA256C3c, SHA256C3d, SHA256C3e, SHA256C3f,
 };
 
-void sha256_transform (const u32 w0[4], const u32 w1[4], const u32 w2[4], const u32 w3[4], u32 digest[8])
+static void sha256_transform (const u32 w0[4], const u32 w1[4], const u32 w2[4], const u32 w3[4], u32 digest[8])
 {
   u32 a = digest[0];
   u32 b = digest[1];