diff --git a/Tools/install.sh b/Tools/install.sh
index 24fea7f0be..6c9c4a5a53 100755
--- a/Tools/install.sh
+++ b/Tools/install.sh
@@ -254,7 +254,7 @@ fi
 
 PYTHON_INSTALL_CMD="python3 -m pip install --upgrade pip protobuf -r \"$SMING_HOME/../Tools/requirements.txt\""
 
-eval $PYTHON_INSTALL_CMD || install_venv "$PYTHON_INSTALL_CMD"  
+eval "$PYTHON_INSTALL_CMD" || install_venv "$PYTHON_INSTALL_CMD"  
 
 
 install() {