diff --git a/java/CMakeLists.txt b/java/CMakeLists.txt
index 3641a1c2..0fc19902 100644
--- a/java/CMakeLists.txt
+++ b/java/CMakeLists.txt
@@ -52,7 +52,7 @@ endif()
 add_jar(turbojpeg-java ${JAVA_SOURCES} OUTPUT_NAME turbojpeg
   ENTRY_POINT TJExample)
 if(MSYS)
-  set(CMAKE_HOST_SYSTEM_NAME ${CMAKE_HOST_SYSTEM_NAME})
+  set(CMAKE_HOST_SYSTEM_NAME ${CMAKE_HOST_SYSTEM_NAME_BAK})
 endif()
 
 if(NOT DEFINED CMAKE_INSTALL_DEFAULT_JAVADIR)