diff --git a/paddle/fluid/operators/math/matrix_bit_code.h b/paddle/fluid/operators/math/matrix_bit_code.h
index 1e2abd1e697a212772f8f757bd5669263e84832f..39c3b1520b41e0d3a7c441f372de2cd44b3f0b67 100644
--- a/paddle/fluid/operators/math/matrix_bit_code.h
+++ b/paddle/fluid/operators/math/matrix_bit_code.h
@@ -159,7 +159,7 @@ class CustomCode : public Code {
 
     for (int i = 0; i < static_cast<int>(ptable_->dims()[1]); i++) {
       if (ptable_->data<R>()[index_ * static_cast<int>(ptable_->dims()[1]) +
-                             i] != -1) {
+                             i] >= 0) {
         length++;
       } else {
         return length;