diff --git a/ggml/src/ggml-cuda/fattn-vec-f16.cuh b/ggml/src/ggml-cuda/fattn-vec-f16.cuh
index 798a59b2..35e649cb 100644
--- a/ggml/src/ggml-cuda/fattn-vec-f16.cuh
+++ b/ggml/src/ggml-cuda/fattn-vec-f16.cuh
@@ -212,6 +212,7 @@ static __global__ void flash_attn_vec_ext_f16(
                 }
             }
             if (__all_sync(0xFFFFFFFF, skip)) {
+                __syncthreads();
                 continue;
             }
 #endif // GGML_USE_HIP
diff --git a/ggml/src/ggml-cuda/fattn-vec-f32.cuh b/ggml/src/ggml-cuda/fattn-vec-f32.cuh
index 49c592ea..95396791 100644
--- a/ggml/src/ggml-cuda/fattn-vec-f32.cuh
+++ b/ggml/src/ggml-cuda/fattn-vec-f32.cuh
@@ -217,6 +217,7 @@ static __global__ void flash_attn_vec_ext_f32(
                 }
             }
             if (__all_sync(0xFFFFFFFF, skip)) {
+                __syncthreads();
                 continue;
             }
 #endif // GGML_USE_HIP