diff --git a/ggml-opencl.cpp b/ggml-opencl.cpp
index 13f603eca..477435ebf 100644
--- a/ggml-opencl.cpp
+++ b/ggml-opencl.cpp
@@ -207,7 +207,7 @@ __kernel void dequantize_block_q2_K(__global const struct block_q2_K *x, __globa
     const int is = 8 * n + l / 16;
 
     const uint8_t q = x[i].qs[32 * n + l];
-    __global float *y = yy + i * 256 + 128 * n;
+    __global float *y = yy + i * QK_K + 128 * n;
 
     const float dall = vload_half(0, &x[i].d);
     const float dmin = vload_half(0, &x[i].dmin);
@@ -239,7 +239,7 @@ __kernel void dequantize_block_q3_K(__global const struct block_q3_K *x, __globa
     float d_all = vload_half(0, &x[i].d);
     float dl = d_all * (us - 32);
 
-    __global float *y = yy + i * 256 + 128 * n + 32 * j;
+    __global float *y = yy + i * QK_K + 128 * n + 32 * j;
     const __global uint8_t *q = x[i].qs + 32 * n;
     const __global uint8_t *hm = x[i].hmask;
 
@@ -256,7 +256,7 @@ __kernel void dequantize_block_q4_K(__global const struct block_q4_K *x, __globa
     const int is = 2 * il;
     const int n = 4;
 
-    __global float *y = yy + i * 256 + 64 * il + n * ir;
+    __global float *y = yy + i * QK_K + 64 * il + n * ir;
 
     const float dall = vload_half(0, &x[i].d);
     const float dmin = vload_half(0, &x[i].dmin);
@@ -285,7 +285,7 @@ __kernel void dequantize_block_q5_K(__global const struct block_q5_K *x, __globa
     const int ir = tid % 16;
     const int is = 2 * il;
 
-    __global float *y = yy + i * 256 + 64 * il + 2 * ir;
+    __global float *y = yy + i * QK_K + 64 * il + 2 * ir;
 
     const float dall = vload_half(0, &x[i].d);
     const float dmin = vload_half(0, &x[i].dmin);
@@ -317,7 +317,7 @@ __kernel void dequantize_block_q6_K(__global const struct block_q6_K *x, __globa
     const int il = tid - 32 * ip;
     const int is = 8 * ip + il / 16;
 
-    __global float *y = yy + i * 256 + 128 * ip + il;
+    __global float *y = yy + i * QK_K + 128 * ip + il;
 
     const float d = vload_half(0, &x[i].d);
 
@@ -436,7 +436,7 @@ __kernel void dequantize_mul_mat_vec_q4_K_fast(__global struct block_q4_K * xx,
     const uint16_t kmask3 = 0xc0c0;
 
     const int row = get_group_id(0);
-    const int num_blocks_per_row = ncols / 256;
+    const int num_blocks_per_row = ncols / QK_K;
     const int ib0 = row*num_blocks_per_row;
 
     const int tid = get_local_id(0)/K_QUANTS_PER_ITERATION;  // 0...15
@@ -466,7 +466,7 @@ __kernel void dequantize_mul_mat_vec_q4_K_fast(__global struct block_q4_K * xx,
 
         const uint8_t * q1 = x[i].qs + q_offset;
         const uint8_t * q2 = q1 + 64;
-        const float   * y1 = y + i*256 + y_offset;
+        const float   * y1 = y + i*QK_K + y_offset;
         const float   * y2 = y1 + 128;
 
         const float dall = vload_half(0, &x[i].d);
@@ -637,18 +637,18 @@ __kernel void KERNEL_NAME(__global X_TYPE* x, __local float* tmp, __global float
     const int row = get_group_id(0);
     const int tid = get_local_id(0);
 
-    const int iter_stride = 256;
+    const int iter_stride = QK_K;
     const int vals_per_iter = iter_stride / block_size;
-    const int num_blocks_per_row = ncols / 256;
+    const int num_blocks_per_row = ncols / QK_K;
     const int ib0 = row*num_blocks_per_row;
 
     tmp[tid] = 0;
 
     for (int i = 0; i < ncols; i += iter_stride) {
         const int col = i + vals_per_iter*tid;
-        const int ib = ib0 + col/256; // x block index
-        const int iqs = col%256; // x quant index
-        const int iybs = col - col%256; // y block start index
+        const int ib = ib0 + col/QK_K; // x block index
+        const int iqs = col%QK_K; // x quant index
+        const int iybs = col - col%QK_K; // y block start index
 
         // dequantize
         float v;
@@ -813,7 +813,7 @@ static cl_program build_program_from_source(cl_context ctx, cl_device_id dev, co
 
     std::string compile_opts = "-cl-mad-enable -cl-unsafe-math-optimizations -cl-finite-math-only -cl-fast-relaxed-math "
                                "-DQK4_0=32 -DQR4_0=2 -DQK4_1=32 -DQR4_1=2 -DQK5_0=32 -DQR5_0=2 -DQK5_1=32 -DQR5_1=2 -DQK8_0=32 -DQR8_0=1 "
-                               "-DK_QUANTS_PER_ITERATION=" + std::to_string(K_QUANTS_PER_ITERATION);
+                               "-DQK_K=256 -DK_QUANTS_PER_ITERATION=" + std::to_string(K_QUANTS_PER_ITERATION);
 
     err = clBuildProgram(p, 0, NULL, compile_opts.c_str(), NULL, NULL);
     if(err < 0) {