diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 67eeecc..3fb34c1 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -22,7 +22,7 @@ if(UNIX) #Checking if compiling on Ubuntu that has a buggy menu system
 endif()
 
 if(MSYS)
-  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -DMSYS2_PROCESS_USE_SH -DJUCI_CMAKE_INSTALL_PREFIX=\\\"${CMAKE_INSTALL_PREFIX}\\\"")
+  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -DMSYS_PROCESS_USE_SH -DJUCI_CMAKE_INSTALL_PREFIX=\\\"${CMAKE_INSTALL_PREFIX}\\\"")
 endif()
 
 INCLUDE(FindPkgConfig)
diff --git a/src/process_win.cc b/src/process_win.cc
index 771c377..a4cc727 100644
--- a/src/process_win.cc
+++ b/src/process_win.cc
@@ -93,7 +93,7 @@ process_id_type Process::open(const std::string &command, const std::string &pat
   }
 
   char* command_cstr;
-#ifdef MSYS2_PROCESS_USE_SH
+#ifdef MSYS_PROCESS_USE_SH
   size_t pos=0;
   std::string sh_command=command;
   while((pos=sh_command.find('\"', pos))!=std::string::npos) {