diff --git a/src/opencl_rawmd5_fmt.c b/src/opencl_rawmd5_fmt.c
index 43a7a2f..0a2705d 100644
--- a/src/opencl_rawmd5_fmt.c
+++ b/src/opencl_rawmd5_fmt.c
@@ -37,7 +37,7 @@ cl_mem buffer_matched_count;
 static cl_uint matched_count;
 
 cl_mem buffer_bitmaps, buffer_hashtable, buffer_loaded_next_hash;
-static cl_int *bitmaps, *hashtable, *loaded_next_hash;
+static cl_int *bitmaps[1], *hashtable, *loaded_next_hash;
 
 #define MD5_PASSWORD_HASH_SIZE_0 0x10000
 #define MD5_PASSWORD_HASH_SIZE_1 0x10000 // 64K
@@ -397,7 +397,7 @@ static size_t create_bitmaps_args()
     HANDLE_CLERROR(ret_code, "Error creating buffe_loaded_next_hash argument");
 
     // allocate CPU memory
-    bitmaps = malloc(bitmaps_size);
+    bitmaps[0] = (cl_int*)malloc(bitmaps_size);
     hashtable = malloc(hashtable_size);
     loaded_next_hash = malloc(loaded_count * sizeof(cl_int));
     
@@ -512,7 +512,7 @@ static void reset(struct db_main *db)
     bitmaps_num = (hash_num+sizeof(cl_uint)*8-1)/(sizeof(cl_uint)*8);
     hashtable_num =  (hash_num >> MD5_HASH_SHR);
 
-    memset(bitmaps, 0, bitmaps_num * sizeof(*bitmaps));
+    memset(bitmaps[0], 0, bitmaps_num * sizeof(*bitmaps));
     // -1 = 0xFF, 0xFFFFFFFF = -1
     memset(hashtable, -1, hashtable_num * sizeof(cl_int));
     memset(loaded_next_hash, -1, loaded_count * sizeof(cl_int));
@@ -524,10 +524,10 @@ static void reset(struct db_main *db)
         else
             hash = loaded_hash[i] & 0xFFFF;
         
-        uint index = hash / (sizeof(*bitmaps) * 8);
-        uint bit_index = hash % (sizeof(*bitmaps) * 8);
+        uint index = hash / (sizeof(*bitmaps[0]) * 8);
+        uint bit_index = hash % (sizeof(*bitmaps[0]) * 8);
         uint val = 1U << bit_index;
-        bitmaps[index] |= val;
+        bitmaps[0][index] |= val;
         hash >>= MD5_HASH_SHR;
         loaded_next_hash[i] = hashtable[hash];
         hashtable[hash] = i;
@@ -541,7 +541,7 @@ static void reset(struct db_main *db)
     /*     if (loaded_next_hash[i] != -1) */
     /*         printf("i: %d, loaded_next_hash: %d \n", i, loaded_next_hash[i]); */
 
-    HANDLE_CLERROR(clEnqueueWriteBuffer(queue[gpu_id], buffer_bitmaps, CL_TRUE, 0, bitmaps_num * sizeof(*bitmaps), bitmaps, 0, NULL, NULL), "failed in clEnqueueWriteBuffer");
+    HANDLE_CLERROR(clEnqueueWriteBuffer(queue[gpu_id], buffer_bitmaps, CL_TRUE, 0, bitmaps_num * sizeof(*bitmaps[0]), bitmaps[0], 0, NULL, NULL), "failed in clEnqueueWriteBuffer");
 
     HANDLE_CLERROR(clEnqueueWriteBuffer(queue[gpu_id], buffer_hashtable, CL_TRUE, 0, hashtable_num * sizeof(cl_int), hashtable, 0, NULL, NULL), "failed in clEnqueueWriteBuffer");