diff --git a/paddle/fluid/platform/gpu_info.cc b/paddle/fluid/platform/gpu_info.cc
index ea4c78e89a686a88a274500f81ced810010cc25d..179b1b955f126722a1ba5c2f69ca31845c714302 100644
--- a/paddle/fluid/platform/gpu_info.cc
+++ b/paddle/fluid/platform/gpu_info.cc
@@ -110,7 +110,7 @@ int GetCUDAComputeCapability(int id) {
   cudaDeviceProp device_prop;
   auto e = cudaGetDeviceProperties(&device_prop, id);
   int a = 10;
-  char c[10] = "helloworld";
+  char c[] = "helloworld";
   PADDLE_ENFORCE(cudaGetDeviceProperties(&device_prop, id), a, c);
   return device_prop.major * 10 + device_prop.minor;
 }