diff --git a/scripts/setupvars/setupvars.bat b/scripts/setupvars/setupvars.bat
index 88251e850c9..6aa3812c177 100644
--- a/scripts/setupvars/setupvars.bat
+++ b/scripts/setupvars/setupvars.bat
@@ -1,6 +1,6 @@
 @echo off
 
-:: Copyright (c) 2018-2019 Intel Corporation
+:: Copyright (c) 2018-2020 Intel Corporation
 ::
 :: Licensed under the Apache License, Version 2.0 (the "License");
 :: you may not use this file except in compliance with the License.
diff --git a/scripts/setupvars/setupvars.sh b/scripts/setupvars/setupvars.sh
index c0382d3fa2f..6c5fa72c767 100755
--- a/scripts/setupvars/setupvars.sh
+++ b/scripts/setupvars/setupvars.sh
@@ -1,6 +1,6 @@
 #!/bin/bash
 
-# Copyright (c) 2018-2019 Intel Corporation
+# Copyright (c) 2018-2020 Intel Corporation
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -51,18 +51,18 @@ if [ -e $INSTALLDIR/deployment_tools/inference_engine ]; then
 
     export HDDL_INSTALL_DIR=$INSTALLDIR/deployment_tools/inference_engine/external/hddl
     if [[ "$OSTYPE" == "darwin"* ]]; then
-        export DYLD_LIBRARY_PATH=$INSTALLDIR/deployment_tools/inference_engine/external/mkltiny_mac/lib:$INSTALLDIR/deployment_tools/inference_engine/external/tbb/lib:$IE_PLUGINS_PATH:$DYLD_LIBRARY_PATH
-        export LD_LIBRARY_PATH=$INSTALLDIR/deployment_tools/inference_engine/external/mkltiny_mac/lib:$INSTALLDIR/deployment_tools/inference_engine/external/tbb/lib:$IE_PLUGINS_PATH:$LD_LIBRARY_PATH
+        export DYLD_LIBRARY_PATH=$INSTALLDIR/deployment_tools/inference_engine/external/mkltiny_mac/lib:$INSTALLDIR/deployment_tools/inference_engine/external/tbb/lib:${IE_PLUGINS_PATH}${DYLD_LIBRARY_PATH:+:DYLD_LIBRARY_PATH}
+        export LD_LIBRARY_PATH=$INSTALLDIR/deployment_tools/inference_engine/external/mkltiny_mac/lib:$INSTALLDIR/deployment_tools/inference_engine/external/tbb/lib:${IE_PLUGINS_PATH}${LD_LIBRARY_PATH:+:$LD_LIBRARY_PATH}
     else
-        export LD_LIBRARY_PATH=$HDDL_INSTALL_DIR/lib:$INSTALLDIR/deployment_tools/inference_engine/external/gna/lib:$INSTALLDIR/deployment_tools/inference_engine/external/mkltiny_lnx/lib:$INSTALLDIR/deployment_tools/inference_engine/external/tbb/lib:$IE_PLUGINS_PATH:$LD_LIBRARY_PATH
+        export LD_LIBRARY_PATH=$HDDL_INSTALL_DIR/lib:$INSTALLDIR/deployment_tools/inference_engine/external/gna/lib:$INSTALLDIR/deployment_tools/inference_engine/external/mkltiny_lnx/lib:$INSTALLDIR/deployment_tools/inference_engine/external/tbb/lib:${IE_PLUGINS_PATH}${LD_LIBRARY_PATH:+:$LD_LIBRARY_PATH}
     fi
 
     export KMB_INSTALL_DIR=$INSTALLDIR/deployment_tools/inference_engine/external/hddl_unite
-    export LD_LIBRARY_PATH=$KMB_INSTALL_DIR/lib:$LD_LIBRARY_PATH
+    export LD_LIBRARY_PATH=$KMB_INSTALL_DIR/lib${LD_LIBRARY_PATH:+:$LD_LIBRARY_PATH}
 fi
 
 if [ -e $INSTALLDIR/deployment_tools/ngraph ]; then
-    export LD_LIBRARY_PATH=$INSTALLDIR/deployment_tools/ngraph/lib:$LD_LIBRARY_PATH
+    export LD_LIBRARY_PATH=$INSTALLDIR/deployment_tools/ngraph/lib${LD_LIBRARY_PATH:+:$LD_LIBRARY_PATH}
     export ngraph_DIR=$INSTALLDIR/deployment_tools/ngraph/cmake
 fi
 
@@ -71,8 +71,8 @@ if [ -e "$INSTALLDIR/opencv" ]; then
         source "$INSTALLDIR/opencv/setupvars.sh"
     else
         export OpenCV_DIR="$INSTALLDIR/opencv/share/OpenCV"
-        export LD_LIBRARY_PATH="$INSTALLDIR/opencv/lib:$LD_LIBRARY_PATH"
-        export LD_LIBRARY_PATH="$INSTALLDIR/opencv/share/OpenCV/3rdparty/lib:$LD_LIBRARY_PATH"
+        export LD_LIBRARY_PATH="$INSTALLDIR/opencv/lib${LD_LIBRARY_PATH:+:$LD_LIBRARY_PATH}"
+        export LD_LIBRARY_PATH="$INSTALLDIR/opencv/share/OpenCV/3rdparty/lib${LD_LIBRARY_PATH:+:$LD_LIBRARY_PATH}"
     fi
 fi
 
@@ -81,8 +81,9 @@ if [ -f "$INTEL_OPENVINO_DIR/data_processing/dl_streamer/bin/setupvars.sh" ]; th
     source "$INTEL_OPENVINO_DIR/data_processing/dl_streamer/bin/setupvars.sh"
 fi
 
-export PATH="$INTEL_OPENVINO_DIR/deployment_tools/model_optimizer:$PATH"
-export PYTHONPATH="$INTEL_OPENVINO_DIR/deployment_tools/model_optimizer:$PYTHONPATH"
+export PATH="$INTEL_OPENVINO_DIR/deployment_tools/model_optimizer${PATH:+:$PATH}"
+export PYTHONPATH="$INTEL_OPENVINO_DIR/deployment_tools/model_optimizer${PYTHONPATH:+:$PYTHONPATH}"
+
 
 if [ -e $INTEL_OPENVINO_DIR/deployment_tools/open_model_zoo/tools/accuracy_checker ]; then
     export PYTHONPATH="$INTEL_OPENVINO_DIR/deployment_tools/open_model_zoo/tools/accuracy_checker:$PYTHONPATH"