diff --git a/ggml/src/ggml-cpu.c b/ggml/src/ggml-cpu.c
index 8fa3f582e..c66e90a9f 100644
--- a/ggml/src/ggml-cpu.c
+++ b/ggml/src/ggml-cpu.c
@@ -11646,22 +11646,22 @@ static void ggml_compute_forward_add_rel_pos(
 static void ggml_compute_forward_rwkv_wkv6_f32(
         const struct ggml_compute_params * params,
         struct ggml_tensor * dst) {
-    const size_t T = dst->src[1]->ne[3];
-    const size_t C = dst->ne[0];
-    const size_t HEADS = dst->src[1]->ne[2];
-    const size_t n_seqs = dst->src[5]->ne[1];
-    const size_t head_size = C / HEADS;
+    const int64_t T = dst->src[1]->ne[3];
+    const int64_t C = dst->ne[0];
+    const int64_t HEADS = dst->src[1]->ne[2];
+    const int64_t n_seqs = dst->src[5]->ne[1];
+    const int64_t head_size = C / HEADS;
 
     float * dst_data = (float *) dst->data;
     float * state = ((float *) dst->data) + C * T;
 
-    if ((size_t)params->ith >= HEADS) {
+    if ((int64_t)params->ith >= HEADS) {
         return;
     }
 
-    size_t h_start = (HEADS * params->ith) / params->nth;
-    size_t h_end = ((HEADS * (size_t)(params->ith + 1)) / (size_t)params->nth < HEADS) ? 
-                (HEADS * (size_t)(params->ith + 1)) / (size_t)params->nth : HEADS;
+    int64_t h_start = (HEADS * params->ith) / params->nth;
+    int64_t h_end = ((HEADS * (params->ith + 1)) / params->nth < HEADS) ? 
+                (HEADS * (params->ith + 1)) / params->nth : HEADS;
 
     float * k =          (float *) dst->src[0]->data;
     float * v =          (float *) dst->src[1]->data;
@@ -11708,20 +11708,20 @@ static void ggml_compute_forward_rwkv_wkv6_f32(
     #endif
 
     #ifdef WKV_VECTOR_SIZE
-        const size_t vec_count = head_size / WKV_VECTOR_SIZE;
+        const int64_t vec_count = head_size / WKV_VECTOR_SIZE;
 
-        for (size_t t = 0; t < T; t++) {
+        for (int64_t t = 0; t < T; t++) {
             size_t t_offset = t * t_stride;
             size_t state_offset = head_size * C * (t / (T / n_seqs));
             float * state_cur = state + state_offset;
             float * state_prev = t % (T / n_seqs) ? state_cur : (float*)dst->src[5]->data + state_offset;
 
-            for (size_t h = h_start; h < h_end; h++) {
+            for (int64_t h = h_start; h < h_end; h++) {
                 size_t h_offset = h * h_stride;
                 size_t t_h_offset = t_offset + h_offset;
                 size_t h_2d_offset = h * h_stride_2d;
 
-                for (size_t i = 0; i < head_size; i++) {
+                for (int64_t i = 0; i < head_size; i++) {
                     size_t t_h_i_offset = t_h_offset + i;
                     size_t h_i_offset = h_offset + i;
                     size_t h_2d_i_offset = h_2d_offset + i * h_stride;
@@ -11737,7 +11737,7 @@ static void ggml_compute_forward_rwkv_wkv6_f32(
                     GGML_F32X time_faaaa_vec = GGML_F32X_SET1(time_faaaa_val);
                     GGML_F32X time_decay_vec = GGML_F32X_SET1(time_decay_val);
 
-                    for (size_t j = 0; j < vec_count; j++) {
+                    for (int64_t j = 0; j < vec_count; j++) {
                         size_t base_j = j * WKV_VECTOR_SIZE;
                         size_t t_h_j_offset = t_h_offset + base_j;
                         size_t h_2d_i_j_offset = h_2d_i_offset + base_j;
@@ -11763,7 +11763,7 @@ static void ggml_compute_forward_rwkv_wkv6_f32(
                     }
 
                     // Handle remaining elements, this will not be used.
-                    for (size_t j = vec_count * VECTOR_SIZE; j < head_size; j++) {
+                    for (int64_t j = vec_count * VECTOR_SIZE; j < head_size; j++) {
                         size_t t_h_j_offset = t_h_offset + j;
                         size_t h_2d_i_j_offset = h_2d_i_offset + j;
                         float v_val = v[t_h_j_offset];
@@ -11782,18 +11782,18 @@ static void ggml_compute_forward_rwkv_wkv6_f32(
         // dst = r @ (time_faaaa * (k @ v) + state),
         // state = time_decay * state + (k @ v),
         // recursive through each token
-        for (size_t t = 0; t < T; t++) {
+        for (int64_t t = 0; t < T; t++) {
             size_t t_offset = t * t_stride;
             size_t state_offset = head_size * C * (t / (T / n_seqs));
             float * state_cur = state + state_offset;
             float * state_prev = t % (T / n_seqs) ? state_cur : (float*)dst->src[5]->data + state_offset;
 
-            for (size_t h = h_start; h < h_end; h++) {
+            for (int64_t h = h_start; h < h_end; h++) {
                 size_t h_offset = h * h_stride;
                 size_t t_h_offset = t_offset + h_offset;
                 size_t h_2d_offset = h * h_stride_2d;
 
-                for (size_t i = 0; i < head_size; i++) {
+                for (int64_t i = 0; i < head_size; i++) {
                     size_t t_h_i_offset = t_h_offset + i;
                     size_t h_i_offset = h_offset + i;
                     size_t h_2d_i_offset = h_2d_offset + i * h_stride;
@@ -11804,7 +11804,7 @@ static void ggml_compute_forward_rwkv_wkv6_f32(
                     // RWKV v6: different time_decay for each token.
                     float time_decay_val = time_decay[t_h_i_offset];
 
-                    for (size_t j = 0; j < head_size; j ++) {
+                    for (int64_t j = 0; j < head_size; j ++) {
                         size_t t_h_j_offset = t_h_offset + j;
                         size_t h_2d_i_j_offset = h_2d_i_offset + j;