diff --git a/paddle/phi/backends/dynload/dynamic_loader.cc b/paddle/phi/backends/dynload/dynamic_loader.cc
index b804e930580db5103598c35480883940e5d9914c..c9ae1d0cd76feeff053e4309b9931b4d02f969f1 100644
--- a/paddle/phi/backends/dynload/dynamic_loader.cc
+++ b/paddle/phi/backends/dynload/dynamic_loader.cc
@@ -479,7 +479,7 @@ void* GetNCCLDsoHandle() {
 #else
   std::string warning_msg(
       "You may need to install 'nccl2' from NVIDIA official website: "
-      "https://developer.nvidia.com/nccl/nccl-download"
+      "https://developer.nvidia.com/nccl/nccl-download "
       "before install PaddlePaddle.");
 #endif