diff --git a/doc/build/build_from_source.md b/doc/build/build_from_source.md
index f4011dfe96a693d624fd50f466611cc231903273..66eca325bcd728b7af32deace26e7ee6c7f7d02a 100644
--- a/doc/build/build_from_source.md
+++ b/doc/build/build_from_source.md
@@ -126,6 +126,8 @@ cd build
 # you can add build option here, such as:    
 cmake -DWITH_GPU=ON -DWITH_DOC=OFF -DCMAKE_INSTALL_PREFIX=<path to install> ..
 make -j `nproc` && make install
+# PaddlePaddle installation path
+export PATH=<path to install>/bin:$PATH
 ```
 **Note**