diff --git a/CPP/myWindows/mySplitCommandLine.cpp b/CPP/myWindows/mySplitCommandLine.cpp

index f8b99b8..7d762bc 100644

--- a/CPP/myWindows/mySplitCommandLine.cpp

+++ b/CPP/myWindows/mySplitCommandLine.cpp

@@ -105,12 +105,8 @@ static void GetCpuName(AString &s)

 void mySplitCommandLine(int numArguments, char *arguments[],UStringVector &parts) {

   { // define P7ZIP_HOME_DIR

-    static char p7zip_home_dir[MAX_PATH];

-    AString dir,name;

-    my_windows_split_path(arguments[0],dir,name);

-    snprintf(p7zip_home_dir,sizeof(p7zip_home_dir),"P7ZIP_HOME_DIR=%s/",(const char *)dir);

-    p7zip_home_dir[sizeof(p7zip_home_dir)-1] = 0;

-    putenv(p7zip_home_dir);

+    if(getenv("P7ZIP_HOME_DIR") == NULL)

+       putenv("P7ZIP_HOME_DIR=" P7ZIP_HOME_DIR);

   }

 #ifdef ENV_HAVE_LOCALE