diff --git a/paddle/fluid/operators/cast_op.cc b/paddle/fluid/operators/cast_op.cc
index bc6cf9d831ff0faf00d3db7fdc6105f301781f8b..76e0f23df21680df33d92d361c1043265e505b50 100644
--- a/paddle/fluid/operators/cast_op.cc
+++ b/paddle/fluid/operators/cast_op.cc
@@ -156,7 +156,7 @@ REGISTER_OP_CPU_KERNEL(
     ops::CastOpKernel<CPU, double>, ops::CastOpKernel<CPU, int>,
     ops::CastOpKernel<CPU, int64_t>, ops::CastOpKernel<CPU, int>,
     ops::CastOpKernel<CPU, int16_t>, ops::CastOpKernel<CPU, bool>,
-    ops::CastOpKernel<CPU, uint8_t>,
+    ops::CastOpKernel<CPU, uint8_t>, ops::CastOpKernel<CPU, int8_t>,
     ops::CastOpKernel<CPU, paddle::platform::float16>,
     ops::CastOpKernel<CPU, paddle::platform::bfloat16>,
     ops::CastOpKernel<CPU, paddle::platform::complex<float>>,