diff --git a/OpenCL/m08500_a0.cl b/OpenCL/m08500_a0.cl
index e81915163..2a1d7a98a 100644
--- a/OpenCL/m08500_a0.cl
+++ b/OpenCL/m08500_a0.cl
@@ -559,6 +559,8 @@ __kernel void m08500_mxx (__global pw_t *pws, __global const kernel_rule_t *rule
     s_skb[7][i] = c_skb[7][i];
   }
 
+  barrier (CLK_LOCAL_MEM_FENCE);
+
   if (gid >= gid_max) return;
 
   /**
diff --git a/OpenCL/m08500_a1.cl b/OpenCL/m08500_a1.cl
index ade03fca5..50d221f52 100644
--- a/OpenCL/m08500_a1.cl
+++ b/OpenCL/m08500_a1.cl
@@ -557,6 +557,8 @@ __kernel void m08500_mxx (__global pw_t *pws, __global const kernel_rule_t *rule
     s_skb[7][i] = c_skb[7][i];
   }
 
+  barrier (CLK_LOCAL_MEM_FENCE);
+
   if (gid >= gid_max) return;
 
   /**
@@ -711,6 +713,8 @@ __kernel void m08500_sxx (__global pw_t *pws, __global const kernel_rule_t *rule
     s_skb[7][i] = c_skb[7][i];
   }
 
+  barrier (CLK_LOCAL_MEM_FENCE);
+
   if (gid >= gid_max) return;
 
   /**