diff --git a/docs/installation.md b/docs/installation.md
index 6e397b0a5..f4fbd5570 100644
--- a/docs/installation.md
+++ b/docs/installation.md
@@ -165,7 +165,7 @@ conda activate mintpy
 pip install -e ./MintPy
 pip install -e ./PyAps
 
-conda env config vars set %cd%/MintPy/
+conda env config vars set PATH=%PATH%;%cd%/MintPy/
 
 conda deactivate
 conda activate MintPy