diff --git a/runtime/syntax/cmod.vim b/runtime/syntax/cmod.vim
new file mode 100644
index 0000000..ea37682
--- /dev/null
+++ b/runtime/syntax/cmod.vim
@@ -0,0 +1,144 @@
+" Vim syntax file
+" Language:		Cmod
+" Current Maintainer:	Stephen R. van den Berg <srb@cuci.nl>
+" Last Change:		2018 Jan 23
+" Version:      	2.9
+" Remark: Is used to edit Cmod files for Pike development.
+" Remark: Includes a highlighter for any embedded Autodoc format.
+
+" quit when a syntax file was already loaded
+if exists("b:current_syntax")
+  finish
+endif
+
+let s:cpo_save = &cpo
+set cpo&vim
+
+" Read the C syntax to start with
+runtime! syntax/c.vim
+unlet b:current_syntax
+
+if !exists("c_autodoc")
+  " For embedded Autodoc documentation
+  syn include @cmodAutodoc <sfile>:p:h/autodoc.vim
+  unlet b:current_syntax
+endif
+
+" Supports rotating amongst several same-level preprocessor conditionals
+packadd! matchit
+let b:match_words = "({:}\\@1<=),^\s*#\s*\%(if\%(n\?def\)\|else\|el\%(se\)\?if\|endif\)\>"
+
+" Cmod extensions
+syn keyword cmodStatement	__INIT INIT EXIT GC_RECURSE GC_CHECK
+syn keyword cmodStatement	EXTRA OPTIMIZE RETURN
+syn keyword cmodStatement	ADD_EFUN ADD_EFUN2 ADD_FUNCTION
+syn keyword cmodStatement	MK_STRING MK_STRING_SVALUE CONSTANT_STRLEN
+
+syn keyword cmodStatement	SET_SVAL pop_n_elems pop_stack
+syn keyword cmodStatement	SIMPLE_ARG_TYPE_ERROR Pike_sp Pike_fp MKPCHARP
+syn keyword cmodStatement	SET_SVAL_TYPE REF_MAKE_CONST_STRING INC_PCHARP
+syn keyword cmodStatement	PTR_FROM_INT INHERIT_FROM_PTR
+syn keyword cmodStatement	DECLARE_CYCLIC BEGIN_CYCLIC END_CYCLIC
+syn keyword cmodStatement	UPDATE_LOCATION UNSAFE_IS_ZERO SAFE_IS_ZERO
+syn keyword cmodStatement	MKPCHARP_STR APPLY_MASTER current_storage
+syn keyword cmodStatement	PIKE_MAP_VARIABLE size_shift
+syn keyword cmodStatement	THREADS_ALLOW THREADS_DISALLOW
+
+syn keyword cmodStatement	add_integer_constant ref_push_object
+syn keyword cmodStatement	push_string apply_svalue free_svalue
+syn keyword cmodStatement	get_inherit_storage get_storage
+syn keyword cmodStatement	make_shared_binary_string push_int64
+syn keyword cmodStatement	begin_shared_string end_shared_string
+syn keyword cmodStatement	add_ref fast_clone_object clone_object
+syn keyword cmodStatement	push_undefined push_int ref_push_string
+syn keyword cmodStatement	free_string push_ulongest free_object
+syn keyword cmodStatement	convert_stack_top_to_bignum push_array
+syn keyword cmodStatement	push_object reduce_stack_top_bignum
+syn keyword cmodStatement	push_static_text apply_current
+syn keyword cmodStatement	assign_svalue free_program destruct_object
+syn keyword cmodStatement	start_new_program low_inherit stack_swap
+syn keyword cmodStatement	generic_error_program end_program
+syn keyword cmodStatement	free_array apply_external copy_mapping
+syn keyword cmodStatement	push_constant_text ref_push_mapping
+syn keyword cmodStatement	mapping_insert mapping_string_insert_string
+syn keyword cmodStatement	f_aggregate_mapping f_aggregate apply
+syn keyword cmodStatement	push_mapping push_svalue low_mapping_lookup
+syn keyword cmodStatement	assign_svalues_no_free f_add
+syn keyword cmodStatement	push_empty_string stack_dup assign_lvalue
+syn keyword cmodStatement	low_mapping_string_lookup allocate_mapping
+syn keyword cmodStatement	copy_shared_string make_shared_binary_string0
+syn keyword cmodStatement	f_call_function f_index f_utf8_to_string
+syn keyword cmodStatement	finish_string_builder init_string_builder
+syn keyword cmodStatement	reset_string_builder free_string_builder
+syn keyword cmodStatement	string_builder_putchar get_all_args
+syn keyword cmodStatement	add_shared_strings check_all_args
+syn keyword cmodStatement	do_inherit add_string_constant
+syn keyword cmodStatement	add_program_constant set_init_callback
+syn keyword cmodStatement	simple_mapping_string_lookup
+syn keyword cmodStatement	f_sprintf push_text string_has_null
+syn keyword cmodStatement	end_and_resize_shared_string
+
+syn keyword cmodStatement	args sp
+
+syn keyword cmodStatement	free
+
+syn keyword cmodConstant	ID_PROTECTED ID_FINAL PIKE_DEBUG
+syn keyword cmodConstant	NUMBER_NUMBER
+syn keyword cmodConstant	PIKE_T_INT PIKE_T_STRING PIKE_T_ARRAY
+syn keyword cmodConstant	PIKE_T_MULTISET PIKE_T_OBJECT PIKE_T_MAPPING
+syn keyword cmodConstant	NUMBER_UNDEFINED PIKE_T_PROGRAM PIKE_T_FUNCTION
+syn keyword cmodConstant	T_OBJECT T_STRING T_ARRAY T_MAPPING
+
+syn keyword cmodException	SET_ONERROR UNSET_ONERROR ONERROR
+syn keyword cmodException	CALL_AND_UNSET_ONERROR
+
+syn keyword cmodDebug		Pike_fatal Pike_error check_stack
+
+syn keyword cmodAccess		public protected private INHERIT
+syn keyword cmodAccess		CTYPE CVAR PIKEVAR PIKEFUN
+
+syn keyword cmodModifier	efun export flags optflags optfunc
+syn keyword cmodModifier	type rawtype errname name c_name prototype
+syn keyword cmodModifier	program_flags gc_trivial PMOD_EXPORT
+syn keyword cmodModifier	ATTRIBUTE noclone noinline
+syn keyword cmodModifier	tOr tFuncV tInt tMix tVoid tStr tMap tPrg
+syn keyword cmodModifier	tSetvar tArr tMult tMultiset
+syn keyword cmodModifier	tArray tMapping tString tSetvar tVar
+
+syn keyword cmodType		bool mapping string multiset array mixed
+syn keyword cmodType		object function program auto svalue
+syn keyword cmodType		bignum longest zero pike_string
+syn keyword cmodType		this this_program THIS INT_TYPE INT64 INT32
+syn keyword cmodType		p_wchar2 PCHARP p_wchar1 p_wchar0 MP_INT
+
+syn keyword cmodOperator	_destruct create __hash _sizeof _indices _values
+syn keyword cmodOperator	_is_type _sprintf _equal _m_delete _get_iterator
+syn keyword cmodOperator	_search _types _serialize _deserialize
+syn keyword cmodOperator	_size_object _random _sqrt TYPEOF SUBTYPEOF
+syn keyword cmodOperator	LIKELY UNLIKELY
+
+syn keyword cmodStructure	DECLARATIONS PIKECLASS DECLARE_STORAGE
+
+if !exists("c_autodoc")
+  syn match cmodAutodocReal display contained "\%(//\|[/ \t\v]\*\|^\*\)\@2<=!.*" contains=@cmodAutodoc containedin=cComment,cCommentL
+  syn cluster cCommentGroup add=cmodAutodocReal
+  syn cluster cPreProcGroup add=cmodAutodocReal
+endif
+
+" Default highlighting
+hi def link cmodAccess		Statement
+hi def link cmodOperator	Operator
+hi def link cmodStatement	Statement
+hi def link cmodConstant	Constant
+hi def link cmodModifier	Type
+hi def link cmodType		Type
+hi def link cmodStorageClass	StorageClass
+hi def link cmodStructure	Structure
+hi def link cmodException	Exception
+hi def link cmodDebug		Debug
+
+let b:current_syntax = "cmod"
+
+let &cpo = s:cpo_save
+unlet s:cpo_save
+" vim: ts=8