diff --git a/include/QF/pr_comp.h b/include/QF/pr_comp.h
index 185a802ad..6b39ff1bc 100644
--- a/include/QF/pr_comp.h
+++ b/include/QF/pr_comp.h
@@ -423,6 +423,16 @@ typedef struct ddef_s {
 	pr_int_t    s_name;
 } ddef_t;
 
+typedef struct xdef_s {
+	pointer_t   type;			///< pointer to type definition
+	pointer_t   ofs;			///< 32-bit version of ddef_t.ofs
+} xdef_t;
+
+typedef struct pr_xdefs_s {
+	pointer_t   xdefs;
+	pr_int_t    num_xdefs;
+} pr_xdefs_t;
+
 typedef struct dparmsize_s {
 	uint8_t     size:5;
 	uint8_t     alignment:3;
diff --git a/tools/qfcc/include/type.h b/tools/qfcc/include/type.h
index 784ed6f9a..c8913933e 100644
--- a/tools/qfcc/include/type.h
+++ b/tools/qfcc/include/type.h
@@ -116,6 +116,9 @@ extern	type_t	type_va_list;
 extern	type_t	type_param;
 extern	type_t	type_zero;
 extern	type_t	type_type_encodings;
+extern	type_t	type_xdef;
+extern	type_t	type_xdef_pointer;
+extern	type_t	type_xdefs;
 
 extern struct symtab_s *vector_struct;
 extern struct symtab_s *quaternion_struct;
diff --git a/tools/qfcc/source/obj_file.c b/tools/qfcc/source/obj_file.c
index d4db18377..79c4effeb 100644
--- a/tools/qfcc/source/obj_file.c
+++ b/tools/qfcc/source/obj_file.c
@@ -879,12 +879,16 @@ qfo_to_progs (qfo_t *qfo, int *size)
 	pr_type_t  *locals;
 	pr_type_t  *far_data;
 	pr_type_t  *type_data;
+	pr_type_t  *xdef_data;
 	dprograms_t *progs;
 	qfo_def_t  *types_def = 0;
+	qfo_def_t  *xdefs_def = 0;
 	unsigned    i, j;
 	unsigned    near_data_size = 0;
 	unsigned    locals_size = 0;
 	int         locals_start;
+	int         type_encodings_start;
+	int         xdefs_start;
 	unsigned    big_locals = 0;
 	int         big_func = 0;
 
@@ -893,7 +897,9 @@ qfo_to_progs (qfo_t *qfo, int *size)
 	progs->version = options.code.progsversion;
 	progs->numstatements = qfo->spaces[qfo_code_space].data_size;
 	progs->numglobaldefs = qfo->spaces[qfo_near_data_space].num_defs;
-	//FIXME ddef offsets are 16 bits
+	//ddef offsets are 16 bits so the ddef ofs will likely be invalid
+	//thus it will be forced invalid and the true offset written to the
+	//symbols file if it is created (fa
 	progs->numglobaldefs += qfo->spaces[qfo_far_data_space].num_defs;
 	progs->numfielddefs = qfo->spaces[qfo_entity_space].num_defs;
 	progs->numfunctions = qfo->num_funcs + 1;
@@ -915,7 +921,11 @@ qfo_to_progs (qfo_t *qfo, int *size)
 	near_data_size = progs->numglobals;
 	progs->numglobals = RUP (progs->numglobals, 16 / sizeof (pr_type_t));
 	progs->numglobals += qfo->spaces[qfo_far_data_space].data_size;
+	type_encodings_start = progs->numglobals;
 	progs->numglobals += qfo->spaces[qfo_type_space].data_size;
+	progs->numglobals = RUP (progs->numglobals, type_xdef.alignment);
+	xdefs_start = progs->numglobals;
+	progs->numglobals += progs->numglobaldefs * type_size (&type_xdef);
 	progs->entityfields = qfo->spaces[qfo_entity_space].data_size;
 	*size += progs->numstatements * sizeof (dstatement_t);
 	*size += progs->numglobaldefs * sizeof (ddef_t);
@@ -954,7 +964,8 @@ qfo_to_progs (qfo_t *qfo, int *size)
 	globals = (pr_type_t*) data;
 	locals = globals + locals_start;
 	far_data = globals + near_data_size;
-	type_data = far_data + qfo->spaces[qfo_far_data_space].data_size;
+	type_data = globals + type_encodings_start;
+	xdef_data = globals + xdefs_start;
 
 	memcpy (strings, qfo->spaces[qfo_strings_space].d.strings,
 			qfo->spaces[qfo_strings_space].data_size * sizeof (char));
@@ -987,14 +998,18 @@ qfo_to_progs (qfo_t *qfo, int *size)
 		qfo_def_t  *def = qfo->spaces[qfo_near_data_space].defs + i;
 		if (!strcmp (QFO_GETSTR (qfo, def->name), ".type_encodings"))
 			types_def = def;
+		if (!strcmp (QFO_GETSTR (qfo, def->name), ".xdefs"))
+			xdefs_def = def;
 		convert_def (qfo, def, globaldefs++);
 	}
 
-	//FIXME ddef offsets are 16 bits
 	for (i = 0; i < qfo->spaces[qfo_far_data_space].num_defs; i++) {
 		qfo_def_t  *def = qfo->spaces[qfo_far_data_space].defs + i;
 		def->offset += far_data - globals;
-		convert_def (qfo, def, globaldefs++);
+		convert_def (qfo, def, globaldefs);
+		// the correct offset will be written to the far data space
+		globaldefs->ofs = -1;
+		globaldefs++;
 	}
 
 	for (i = 0; i < qfo->spaces[qfo_type_space].num_defs; i++) {
@@ -1025,9 +1040,27 @@ qfo_to_progs (qfo_t *qfo, int *size)
 	if (types_def) {
 		qfot_type_encodings_t *encodings;
 		encodings = (qfot_type_encodings_t *) &globals[types_def->offset];
-		encodings->types = type_data - globals;
+		encodings->types = type_encodings_start;
 		encodings->size = qfo->spaces[qfo_type_space].data_size;
 	}
+	if (xdefs_def) {
+		int xdef_data_size = type_size (&type_xdef);
+		pr_xdefs_t  *xdefs = (pr_xdefs_t *) &globals[xdefs_def->offset];
+		xdefs->xdefs = xdefs_start;
+		xdefs->num_xdefs = progs->numglobaldefs;
+		for (i = 0; i < qfo->spaces[qfo_near_data_space].num_defs; i++) {
+			qfo_def_t  *def = qfo->spaces[qfo_near_data_space].defs + i;
+			xdef_data[0].pointer_var = def->type + type_encodings_start;
+			xdef_data[1].pointer_var = def->offset;
+			xdef_data += xdef_data_size;
+		}
+		for (i = 0; i < qfo->spaces[qfo_far_data_space].num_defs; i++) {
+			qfo_def_t  *def = qfo->spaces[qfo_far_data_space].defs + i;
+			xdef_data[0].pointer_var = def->type + type_encodings_start;
+			xdef_data[1].pointer_var = def->offset;
+			xdef_data += xdef_data_size;
+		}
+	}
 
 	// undo the relocation of the offsets of local defs so the local defs have
 	// the correct offset in the debug info
diff --git a/tools/qfcc/source/qfcc.c b/tools/qfcc/source/qfcc.c
index 780db073a..9e292d136 100644
--- a/tools/qfcc/source/qfcc.c
+++ b/tools/qfcc/source/qfcc.c
@@ -423,6 +423,7 @@ finish_link (void)
 						&param_size);
 		linker_add_def (".param_alignment", &type_integer, flags,
 						&param_alignment);
+		linker_add_def (".xdefs", &type_xdefs, flags, 0);
 	}
 
 	if (options.code.debug) {
diff --git a/tools/qfcc/source/type.c b/tools/qfcc/source/type.c
index e33f0ec34..04c8d7442 100644
--- a/tools/qfcc/source/type.c
+++ b/tools/qfcc/source/type.c
@@ -89,6 +89,9 @@ type_t      type_param = { ev_invalid, 0, 0, ty_struct };
 type_t      type_zero = { ev_invalid, 0, 0, ty_struct };
 type_t      type_type_encodings = { ev_invalid, "@type_encodings", 0,
 									ty_struct };
+type_t      type_xdef = { ev_invalid, "@xdef", 0, ty_struct };
+type_t      type_xdef_pointer = { ev_pointer, 0, 1, ty_basic, {{&type_xdef}} };
+type_t      type_xdefs = { ev_invalid, "@xdefs", 0, ty_struct };
 
 type_t      type_floatfield = { ev_field, ".float", 1, ty_basic,
 								{{&type_float}} };
@@ -1045,6 +1048,16 @@ init_types (void)
 		{"size",	&type_integer},
 		{0, 0}
 	};
+	static struct_def_t xdef_struct[] = {
+		{"types",	&type_pointer},
+		{"offset",	&type_pointer},
+		{0, 0}
+	};
+	static struct_def_t xdefs_struct[] = {
+		{"xdefs",	&type_xdef_pointer},
+		{"num_xdefs", &type_pointer},
+		{0, 0}
+	};
 
 	type_nil = &type_quaternion;
 	type_default = &type_integer;
@@ -1066,6 +1079,8 @@ init_types (void)
 
 	make_structure ("@type_encodings", 's', type_encoding_struct,
 					&type_type_encodings);
+	make_structure ("@xdef", 's', xdef_struct, &type_xdef);
+	make_structure ("@xdefs", 's', xdefs_struct, &type_xdefs);
 
 	if (options.traditional)
 		return;
@@ -1120,6 +1135,9 @@ chain_initial_types (void)
 	chain_type (&type_param);
 	chain_type (&type_zero);
 	chain_type (&type_type_encodings);
+	chain_type (&type_xdef);
+	chain_type (&type_xdef_pointer);
+	chain_type (&type_xdefs);
 
 	va_list_struct[1].type = pointer_type (&type_param);
 	make_structure ("@va_list", 's', va_list_struct, &type_va_list);
diff --git a/tools/qwaq/main.qc b/tools/qwaq/main.qc
index 1014c1f4d..25cfaabdb 100644
--- a/tools/qwaq/main.qc
+++ b/tools/qwaq/main.qc
@@ -109,5 +109,6 @@ int main (int argc, string *argv)
 	test_script ();
 	test_plist ();
 	test_types ();
+	test_xdefs ();
 	return 0;
 };
diff --git a/tools/qwaq/types.r b/tools/qwaq/types.r
index 324185b93..5cf874c61 100644
--- a/tools/qwaq/types.r
+++ b/tools/qwaq/types.r
@@ -77,6 +77,16 @@ typedef struct qfot_type_encodings_s {
 	int         size;
 } qfot_type_encodings_t;
 
+typedef struct xdef_s {
+	qfot_type_t *type;
+	void        *offset;
+} xdef_t;
+
+typedef struct pr_xdefs_s {
+	xdef_t     *xdefs;
+	int         num_xdefs;
+} pr_xdefs_t;
+
 qfot_type_t *
 next_type (qfot_type_t *type)
 {
@@ -174,3 +184,20 @@ test_types (void)
 		}
 	 }
 }
+
+void
+test_xdefs (void)
+{
+	pr_xdefs_t *xdefs;
+	int         i;
+
+	xdefs = PR_FindGlobal (".xdefs");
+	if (!xdefs) {
+		printf ("Can't find xdefs\n");
+		return;
+	}
+	printf ("%p %i\n", xdefs.xdefs, xdefs.num_xdefs);
+	for (i = 0; i < xdefs.num_xdefs; i++) {
+		printf ("%p %p\n", xdefs.xdefs[i].type, xdefs.xdefs[i].offset);
+	}
+}