diff --git a/configure.ac b/configure.ac
index 6220d4a6..4a2afb7c 100644
--- a/configure.ac
+++ b/configure.ac
@@ -124,6 +124,7 @@ AC_CHECK_FUNC([readdir],,  AC_MSG_ERROR("Could not find readdir in c library"))
 AC_CHECK_HEADER([math.h],, AC_MSG_ERROR("Could not find math.h header file"))
 AC_SEARCH_LIBS([floor],[m],,      AC_MSG_ERROR("Could not find floor in math library"))
 AC_SEARCH_LIBS([ceil], [m],,      AC_MSG_ERROR("Could not find ceil in math library"))
+AC_SEARCH_LIBS([round], [m],,      AC_MSG_ERROR("Could not find round in math library"))
 
 AC_CHECK_HEADER([sysexits.h],, AC_MSG_ERROR("Could not find the sysexists.h header file"))
 AC_CHECK_HEADER([setjmp.h],,   AC_MSG_ERROR("Could not find the setjmp.h header file"))
diff --git a/source/xrmoptions.c b/source/xrmoptions.c
index c702b398..80924135 100644
--- a/source/xrmoptions.c
+++ b/source/xrmoptions.c
@@ -354,7 +354,8 @@ static XrmOption xrmOptions[] = {
      "combi-hide-mode-prefix",
      {.snum = &config.combi_hide_mode_prefix},
      NULL,
-     "Hide the prefix mode prefix on the combi view.",
+     "Hide the prefix mode prefix on the combi view.**deprecated** use "
+     "combi-display-format",
      CONFIG_DEFAULT},
     {xrm_String,
      "combi-display-format",