diff --git a/ggml-metal.metal b/ggml-metal.metal
index 0c6d32798..7af4e8f93 100644
--- a/ggml-metal.metal
+++ b/ggml-metal.metal
@@ -2217,7 +2217,7 @@ kernel void kernel_flash_attn_ext_f16(
 
         // ALiBi
         if (max_bias > 0.0f) {
-            const short h = iq2;
+            const uint32_t h = iq2;
 
             const float base = h < n_head_log2 ? m0 : m1;
             const int   exph = h < n_head_log2 ? h + 1 : 2*(h - n_head_log2) + 1;
@@ -2473,7 +2473,7 @@ kernel void kernel_flash_attn_ext_vec_f16(
 
     // ALiBi
     if (max_bias > 0.0f) {
-        const short h = iq2;
+        const uint32_t h = iq2;
 
         const float base = h < n_head_log2 ? m0 : m1;
         const int   exp  = h < n_head_log2 ? h + 1 : 2*(h - n_head_log2) + 1;
diff --git a/scripts/sync-ggml.last b/scripts/sync-ggml.last
index 46b874c64..1ea320429 100644
--- a/scripts/sync-ggml.last
+++ b/scripts/sync-ggml.last
@@ -1 +1 @@
-d2ad1793f45922665c99f5cf4244dcab77e16c00
+30f54cbb3ada3e4c5bc6924de3e5918e5be4ff11