diff --git a/Source/build.cpp b/Source/build.cpp
index 79318a4d..9b1e7bb5 100644
--- a/Source/build.cpp
+++ b/Source/build.cpp
@@ -1187,10 +1187,9 @@ int CEXEBuild::add_section(const TCHAR *secname, const TCHAR *defname, int expan
 
   TCHAR *name = (TCHAR*)secname;
 
-  // Is it a hidden section?
-  if (secname[0] == _T('-'))
+  if (name[0] == _T('\x1F'))    // SectionGroup/SectionGroupEnd
   {
-    if (secname[1])
+    if (name[1])
     {
       new_section.flags |= SF_SECGRP;
       name++;
@@ -1199,6 +1198,10 @@ int CEXEBuild::add_section(const TCHAR *secname, const TCHAR *defname, int expan
       new_section.flags |= SF_SECGRPEND;
   }
 
+  int hidden = (name[0] == _T('-'));
+  if (hidden)
+    name++;
+  
   if (name[0] == _T('!'))
   {
     name++;
@@ -1236,8 +1239,8 @@ int CEXEBuild::add_section(const TCHAR *secname, const TCHAR *defname, int expan
 
   new_section.code = cur_entries->getlen() / sizeof(entry);
 
-  new_section.install_types = *name ? 0 : ~0;
-  new_section.name_ptr = add_string(name);
+  new_section.install_types = (!hidden && *name) ? 0 : ~0;
+  new_section.name_ptr = hidden ? 0 : add_string(name);
   memset(&new_section.name,0,sizeof(new_section.name));
 
   cur_sections->add(&new_section, sizeof(section));
diff --git a/Source/script.cpp b/Source/script.cpp
index ca014873..55859d68 100644
--- a/Source/script.cpp
+++ b/Source/script.cpp
@@ -3457,14 +3457,7 @@ int CEXEBuild::doCommand(int which_token, LineParser &line)
 
       int ret;
 
-      if (line.gettoken_str(a)[0]==_T('-'))
-      {
-        if (!_tcsnicmp(line.gettoken_str(a)+1,_T("un."),3))
-          ret=add_section(_T("un."),line.gettoken_str(a+1));
-        else
-          ret=add_section(_T(""),line.gettoken_str(a+1));
-      }
-      else ret=add_section(line.gettoken_str(a),line.gettoken_str(a+1));
+      ret=add_section(line.gettoken_str(a),line.gettoken_str(a+1));
       if (ret != PS_OK) return ret;
 
       if (unselected)
@@ -3522,7 +3515,7 @@ int CEXEBuild::doCommand(int which_token, LineParser &line)
         ex = 1;
         a++;
       }
-      wsprintf(buf,_T("-%s"),line.gettoken_str(a));
+      wsprintf(buf,_T("\x1F%s"),line.gettoken_str(a));
       if (which_token == TOK_SECTIONGROUP || which_token == TOK_SUBSECTION)
       {
         TCHAR *s = line.gettoken_str(a);