diff --git a/CMakeLists.txt b/CMakeLists.txt
index 50b3cbaaf189..797a43900578 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -513,7 +513,7 @@ if(USE_SWIG)
             TARGET _lightgbm_swig
             POST_BUILD
             COMMAND "${Java_JAVAC_EXECUTABLE}" -d . java/*.java
-            COMMAND cp "${PROJECT_SOURCE_DIR}/Release/*.dll" com/microsoft/ml/lightgbm/windows/x86_64
+            COMMAND copy "..\\Release\\*.dll" "com\\microsoft\\ml\\lightgbm\\windows\\x86_64"
             COMMAND "${Java_JAR_EXECUTABLE}" -cf lightgbmlib.jar com
         )
     endif()