diff --git a/src/llama-graph.cpp b/src/llama-graph.cpp
index 5bca8230b9b..e6ec3054daf 100644
--- a/src/llama-graph.cpp
+++ b/src/llama-graph.cpp
@@ -2656,14 +2656,18 @@ llm_graph_input_attn_k_dsa * llm_graph_context::build_attn_inp_k_dsa() const {
         inp->self_k_idxs_mla = mctx_cur->get_mla()->build_input_k_idxs(ctx0, ubatch);
 
         inp->self_kq_mask_mla = build_attn_inp_kq_mask(ctx0, mctx_cur->get_mla(), ubatch, cparams);
-        inp->self_kq_mask_mla_cnv = cparams.flash_attn ? ggml_cast(ctx0, inp->self_kq_mask_mla, GGML_TYPE_F16) : inp->self_kq_mask_mla;
+        inp->self_kq_mask_mla_cnv = inp->self_kq_mask_mla;
     }
 
     {
         inp->self_k_idxs_lid = mctx_cur->get_lid()->build_input_k_idxs(ctx0, ubatch);
 
-        inp->self_kq_mask_lid = build_attn_inp_kq_mask(ctx0, mctx_cur->get_lid(), ubatch, cparams);
-        inp->self_kq_mask_lid_cnv = cparams.flash_attn ? ggml_cast(ctx0, inp->self_kq_mask_lid, GGML_TYPE_F16) : inp->self_kq_mask_lid;
+        // ensure F32 mask
+        auto cparams_copy = cparams;
+        cparams_copy.flash_attn = false;
+
+        inp->self_kq_mask_lid = build_attn_inp_kq_mask(ctx0, mctx_cur->get_lid(), ubatch, cparams_copy);
+        inp->self_kq_mask_lid_cnv = inp->self_kq_mask_lid;
 
         inp->self_k_rot_lid = mctx_cur->get_lid()->build_input_k_rot(ctx0);
     }
diff --git a/src/llama-graph.h b/src/llama-graph.h
index d07a084a8d6..eab82bd0d70 100644
--- a/src/llama-graph.h
+++ b/src/llama-graph.h
@@ -399,10 +399,10 @@ class llm_graph_input_attn_k_dsa : public llm_graph_input_i {
     ggml_tensor * self_k_idxs_mla = nullptr; // I64 [n_batch]
     ggml_tensor * self_k_idxs_lid = nullptr; // I64 [n_batch]
 
-    ggml_tensor * self_kq_mask_mla     = nullptr; // F32 [n_kv, n_batch/n_stream, 1, n_stream]
-    ggml_tensor * self_kq_mask_mla_cnv = nullptr; //     [n_kv, n_batch/n_stream, 1, n_stream]
-    ggml_tensor * self_kq_mask_lid     = nullptr; // F32 [n_kv, n_batch/n_stream, 1, n_stream]
-    ggml_tensor * self_kq_mask_lid_cnv = nullptr; //     [n_kv, n_batch/n_stream, 1, n_stream]
+    ggml_tensor * self_kq_mask_mla     = nullptr; // F32/F16 [n_kv, n_batch/n_stream, 1, n_stream]
+    ggml_tensor * self_kq_mask_mla_cnv = nullptr; //         [n_kv, n_batch/n_stream, 1, n_stream]
+    ggml_tensor * self_kq_mask_lid     = nullptr; // F32     [n_kv, n_batch/n_stream, 1, n_stream]
+    ggml_tensor * self_kq_mask_lid_cnv = nullptr; //         [n_kv, n_batch/n_stream, 1, n_stream]
 
     ggml_tensor * self_k_rot_lid = nullptr;