diff --git a/include/xtables.h.in b/include/xtables.h.in
index da8d84c..47f797b 100644
--- a/include/xtables.h.in
+++ b/include/xtables.h.in
@@ -49,6 +49,7 @@
  * %XTTYPE_NONE:	option takes no argument
  * %XTTYPE_UINT*:	standard integer
  * %XTTYPE_UINT*RC:	colon-separated range of standard integers
+ * %XTTYPE_DOUBLE:	double-precision floating point number
  * %XTTYPE_STRING:	arbitrary string
  * %XTTYPE_TOSMASK:	8-bit TOS value with optional mask
  * %XTTYPE_MARKMASK32:	32-bit mark with optional mask
@@ -69,6 +70,7 @@
 	XTTYPE_UINT16RC,
 	XTTYPE_UINT32RC,
 	XTTYPE_UINT64RC,
+	XTTYPE_DOUBLE,
 	XTTYPE_STRING,
 	XTTYPE_TOSMASK,
 	XTTYPE_MARKMASK32,
@@ -136,6 +138,7 @@
 		uint16_t u16, u16_range[2], port, port_range[2];
 		uint32_t u32, u32_range[2];
 		uint64_t u64, u64_range[2];
+		double dbl;
 		union nf_inet_addr inetaddr;
 		struct {
 			uint8_t tos_value, tos_mask;
diff --git a/xtoptions.c b/xtoptions.c
index 1cfc844..86498a9 100644
--- a/xtoptions.c
+++ b/xtoptions.c
@@ -144,6 +144,29 @@
 }
 
 /**
+ * Require a simple floating point number.
+ */
+static void xtopt_parse_float(struct xt_option_call *cb)
+{
+	const struct xt_option_entry *entry = cb->entry;
+	double value;
+	char *end;
+
+	value = strtod(cb->arg, &end);
+	if (end == cb->arg || *end != '\0' ||
+	    (entry->min != entry->max &&
+	    (value < entry->min || value > entry->max)))
+		xt_params->exit_err(PARAMETER_PROBLEM,
+			"%s: bad value for option \"--%s\", "
+			"or out of range (%u-%u).\n",
+			cb->ext_name, entry->name, entry->min, entry->max);
+
+	cb->val.dbl = value;
+	if (entry->flags & XTOPT_PUT)
+		*(double *)XTOPT_MKPTR(cb) = cb->val.dbl;
+}
+
+/**
  * Multiple integer parse routine.
  *
  * This function is capable of parsing any number of fields. Only the first
@@ -547,6 +570,7 @@
 	[XTTYPE_UINT16RC]    = xtopt_parse_mint,
 	[XTTYPE_UINT32RC]    = xtopt_parse_mint,
 	[XTTYPE_UINT64RC]    = xtopt_parse_mint,
+	[XTTYPE_DOUBLE]      = xtopt_parse_float,
 	[XTTYPE_STRING]      = xtopt_parse_string,
 	[XTTYPE_TOSMASK]     = xtopt_parse_tosmask,
 	[XTTYPE_MARKMASK32]  = xtopt_parse_markmask,
@@ -567,6 +591,7 @@
 	[XTTYPE_UINT16RC]    = sizeof(uint16_t[2]),
 	[XTTYPE_UINT32RC]    = sizeof(uint32_t[2]),
 	[XTTYPE_UINT64RC]    = sizeof(uint64_t[2]),
+	[XTTYPE_DOUBLE]      = sizeof(double),
 	[XTTYPE_STRING]      = -1,
 	[XTTYPE_SYSLOGLEVEL] = sizeof(uint8_t),
 	[XTTYPE_ONEHOST]     = sizeof(union nf_inet_addr),