diff --git a/csrc/cpu/cpu_attn_vec.hpp b/csrc/cpu/cpu_attn_vec.hpp
index 479313f0e..f51a232ba 100644
--- a/csrc/cpu/cpu_attn_vec.hpp
+++ b/csrc/cpu/cpu_attn_vec.hpp
@@ -53,7 +53,7 @@ class TileGemm82 {
                          const int64_t ldb, const int64_t ldc,
                          const int32_t block_size, const int32_t dynamic_k_size,
                          const bool accum_c) {
-    static_assert(0 < M <= 8);
+    static_assert(0 < M && M <= 8);
     using load_vec_t = typename VecTypeTrait<kv_cache_t>::vec_t;
 
     kv_cache_t* __restrict__ curr_b_0 = b_tile;
diff --git a/csrc/cpu/cpu_attn_vec16.hpp b/csrc/cpu/cpu_attn_vec16.hpp
index 7402312c0..06e4ad762 100644
--- a/csrc/cpu/cpu_attn_vec16.hpp
+++ b/csrc/cpu/cpu_attn_vec16.hpp
@@ -68,7 +68,7 @@ class TileGemm161 {
                          const int64_t ldb, const int64_t ldc,
                          const int32_t block_size, const int32_t dynamic_k_size,
                          const bool accum_c) {
-    static_assert(0 < M <= 16);
+    static_assert(0 < M && M <= 16);
     using load_vec_t = typename VecTypeTrait<kv_cache_t>::vec_t;
 
     kv_cache_t* __restrict__ curr_b_0 = b_tile;
diff --git a/csrc/cpu/micro_gemm/cpu_micro_gemm_vec.hpp b/csrc/cpu/micro_gemm/cpu_micro_gemm_vec.hpp
index bdd3e85a1..1c605a285 100644
--- a/csrc/cpu/micro_gemm/cpu_micro_gemm_vec.hpp
+++ b/csrc/cpu/micro_gemm/cpu_micro_gemm_vec.hpp
@@ -39,7 +39,7 @@ class TileGemm82 {
 
   template <int32_t M>
   static void gemm_micro(DEFINE_CPU_MICRO_GEMM_PARAMS) {
-    static_assert(0 < M <= 8);
+    static_assert(0 < M && M <= 8);
     using load_vec_t = typename cpu_utils::VecTypeTrait<scalar_t>::vec_t;
 
     scalar_t* __restrict__ curr_b_0 = b_ptr;