diff --git a/paddle/function/Function.cpp b/paddle/function/Function.cpp
index 02880e5ea1acb85d8685f865a5745f7090db03d2..eb005e6744f2f343ad6feab84d5851b7760a1e58 100644
--- a/paddle/function/Function.cpp
+++ b/paddle/function/Function.cpp
@@ -32,14 +32,14 @@ real FuncConfig::get<real>(const std::string& key) const {
 
 template <>
 FuncConfig& FuncConfig::set<size_t>(const std::string& key, size_t v) {
-  CHECK(valueMap_.count(key) == 0) << "Duplicated value: " << key;
+  CHECK_EQ(valueMap_.count(key), 0) << "Duplicated value: " << key;
   valueMap_[key].s = v;
   return *this;
 }
 
 template <>
 FuncConfig& FuncConfig::set<real>(const std::string& key, real v) {
-  CHECK(valueMap_.count(key) == 0) << "Duplicated value: " << key;
+  CHECK_EQ(valueMap_.count(key), 0) << "Duplicated value: " << key;
   valueMap_[key].r = v;
   return *this;
 }