diff --git a/impl/matmul/math_util.cpp b/impl/matmul/math_util.cpp
index 35e6a5fce02742fb69024c3a9e415a70874d827e..5d24f0cc5c82637c453597f5e7cce47330a8dfcd 100644
--- a/impl/matmul/math_util.cpp
+++ b/impl/matmul/math_util.cpp
@@ -35,6 +35,7 @@ bool MathUtil::IsEqual(float leftValue, float rightValue)
 int32_t MathUtil::CeilDivision(int32_t num1, int32_t num2)
 {
     if (num2 == 0) {
+        num1 = 1;
         return 0;
     }
     return static_cast<int32_t>((static_cast<int64_t>(num1) + static_cast<int64_t>(num2) - 1) /