diff --git a/hw/xfree86/common/xf86Opt.h b/hw/xfree86/common/xf86Opt.h
index 34d936bc7..d210c7c31 100644
--- a/hw/xfree86/common/xf86Opt.h
+++ b/hw/xfree86/common/xf86Opt.h
@@ -140,9 +140,6 @@ extern _X_EXPORT char *xf86NormalizeName(const char *s);
 extern _X_EXPORT XF86OptionPtr xf86ReplaceIntOption(XF86OptionPtr optlist,
                                                     const char *name,
                                                     const int val);
-extern _X_EXPORT XF86OptionPtr xf86ReplaceRealOption(XF86OptionPtr optlist,
-                                                     const char *name,
-                                                     const double val);
 extern _X_EXPORT XF86OptionPtr xf86ReplaceBoolOption(XF86OptionPtr optlist,
                                                      const char *name,
                                                      const Bool val);
diff --git a/hw/xfree86/common/xf86Option.c b/hw/xfree86/common/xf86Option.c
index 32b0aff1d..14748c642 100644
--- a/hw/xfree86/common/xf86Option.c
+++ b/hw/xfree86/common/xf86Option.c
@@ -303,15 +303,6 @@ xf86ReplaceIntOption(XF86OptionPtr optlist, const char *name, const int val)
     return xf86AddNewOption(optlist, name, tmp);
 }
 
-XF86OptionPtr
-xf86ReplaceRealOption(XF86OptionPtr optlist, const char *name, const double val)
-{
-    char tmp[32];
-
-    snprintf(tmp, sizeof(tmp), "%f", val);
-    return xf86AddNewOption(optlist, name, tmp);
-}
-
 XF86OptionPtr
 xf86ReplaceBoolOption(XF86OptionPtr optlist, const char *name, const Bool val)
 {