diff --git a/third_party/intel/lib/TritonIntelGPUToLLVM/LoadStoreOpToLLVM.cpp b/third_party/intel/lib/TritonIntelGPUToLLVM/LoadStoreOpToLLVM.cpp
index fb22cb33bc..711124db07 100644
--- a/third_party/intel/lib/TritonIntelGPUToLLVM/LoadStoreOpToLLVM.cpp
+++ b/third_party/intel/lib/TritonIntelGPUToLLVM/LoadStoreOpToLLVM.cpp
@@ -263,8 +263,11 @@ struct LoadStoreConversionBase {
             {blockPtr.begin() + blockShape, blockPtr.begin() + blockStride},
             b.int_val(1, 1),
             [&](const Value &index, const Value &shape, const Value &mask) {
-              // mask = mask && (index < shape)
-              return b.and_(b.icmp_slt(index, b.trunc(i32_ty, shape)), mask);
+              // mask = mask && (index < shape) && idx >= 0
+              auto is_pos_idx = b.icmp_sge(index, b.int_val(32, 0));
+              return b.and_(
+                  b.and_(b.icmp_slt(index, b.trunc(i32_ty, shape)), mask),
+                  is_pos_idx);
             }));
       }
     }