diff --git a/velox/functions/prestosql/registration/ProbabilityTrigonometricFunctionsRegistration.cpp b/velox/functions/prestosql/registration/ProbabilityTrigonometricFunctionsRegistration.cpp
index c44489d3bcbf..4e66db644a2c 100644
--- a/velox/functions/prestosql/registration/ProbabilityTrigonometricFunctionsRegistration.cpp
+++ b/velox/functions/prestosql/registration/ProbabilityTrigonometricFunctionsRegistration.cpp
@@ -52,8 +52,6 @@ void registerProbTrigFunctions(const std::string& prefix) {
       {prefix + "inverse_beta_cdf"});
   registerFunction<InverseNormalCDFFunction, double, double, double, double>(
       {prefix + "inverse_normal_cdf"});
-  registerFunction<PoissonCDFFunction, double, double, int64_t>(
-      {prefix + "poisson_cdf"});
   registerFunction<PoissonCDFFunction, double, double, int32_t>(
       {prefix + "poisson_cdf"});
   registerFunction<GammaCDFFunction, double, double, double, double>(
diff --git a/velox/functions/prestosql/tests/ProbabilityTest.cpp b/velox/functions/prestosql/tests/ProbabilityTest.cpp
index f85c9b9c140d..5cb4329ad375 100644
--- a/velox/functions/prestosql/tests/ProbabilityTest.cpp
+++ b/velox/functions/prestosql/tests/ProbabilityTest.cpp
@@ -398,7 +398,6 @@ TEST_F(ProbabilityTest, gammaCDF) {
 
 TEST_F(ProbabilityTest, poissonCDF) {
   poissonCDFTests<int32_t>();
-  poissonCDFTests<int64_t>();
 }
 
 TEST_F(ProbabilityTest, binomialCDF) {