diff --git a/OpenCL/m13100_a0.cl b/OpenCL/m13100_a0.cl
index a82bbdc49..768cf47e9 100644
--- a/OpenCL/m13100_a0.cl
+++ b/OpenCL/m13100_a0.cl
@@ -86,7 +86,7 @@ void rc4_init_16 (SCR_TYPE RC4_KEY *rc4_key, const u32 data[4])
   }
 }
 
-u8 rc4_next_16 (SCR_TYPE RC4_KEY *rc4_key, u8 i, u8 j, __global const u32 in[4], u32 out[4])
+u8 rc4_next_16 (SCR_TYPE RC4_KEY *rc4_key, u8 i, u8 j, __global u32 *in, u32 out[4])
 {
   #ifdef _unroll
   #pragma unroll
diff --git a/OpenCL/m13100_a1.cl b/OpenCL/m13100_a1.cl
index dc3075af3..53ecaf5f5 100644
--- a/OpenCL/m13100_a1.cl
+++ b/OpenCL/m13100_a1.cl
@@ -84,7 +84,7 @@ void rc4_init_16 (SCR_TYPE RC4_KEY *rc4_key, const u32 data[4])
   }
 }
 
-u8 rc4_next_16 (SCR_TYPE RC4_KEY *rc4_key, u8 i, u8 j, __global const u32 in[4], u32 out[4])
+u8 rc4_next_16 (SCR_TYPE RC4_KEY *rc4_key, u8 i, u8 j, __global u32 *in, u32 out[4])
 {
   #ifdef _unroll
   #pragma unroll
diff --git a/OpenCL/m13100_a3.cl b/OpenCL/m13100_a3.cl
index 0db38f6ba..f053436ab 100644
--- a/OpenCL/m13100_a3.cl
+++ b/OpenCL/m13100_a3.cl
@@ -84,7 +84,7 @@ void rc4_init_16 (SCR_TYPE RC4_KEY *rc4_key, const u32 data[4])
   }
 }
 
-u8 rc4_next_16 (SCR_TYPE RC4_KEY *rc4_key, u8 i, u8 j, __global const u32 in[4], u32 out[4])
+u8 rc4_next_16 (SCR_TYPE RC4_KEY *rc4_key, u8 i, u8 j, __global u32 *in, u32 out[4])
 {
   #ifdef _unroll
   #pragma unroll