diff --git a/cmd/tools/check_os_api_parity.v b/cmd/tools/check_os_api_parity.v
index 1e3b2b7eca..677eee7893 100644
--- a/cmd/tools/check_os_api_parity.v
+++ b/cmd/tools/check_os_api_parity.v
@@ -99,7 +99,7 @@ fn (app App) gen_api_for_module_in_os(mod_name, os_name string) string {
 		for s in f.stmts {
 			if s is ast.FnDecl {
 				if s.is_pub {
-					fn_signature := s.stringify(b.table)
+					fn_signature := s.stringify(b.table, mod_name)
 					fn_mod := s.modname()
 					if fn_mod == mod_name {
 						fline := '${fn_mod}: $fn_signature'
diff --git a/vlib/v/ast/str.v b/vlib/v/ast/str.v
index 2aaeceb111..d0b5ae2cc3 100644
--- a/vlib/v/ast/str.v
+++ b/vlib/v/ast/str.v
@@ -24,18 +24,19 @@ pub fn (node &FnDecl) modname() string {
 
 // These methods are used only by vfmt, vdoc, and for debugging.
 
-pub fn (node &FnDecl) stringify(t &table.Table) string {
+pub fn (node &FnDecl) stringify(t &table.Table, cur_mod string) string {
 	mut f := strings.new_builder(30)
 	if node.is_pub {
 		f.write('pub ')
 	}
 	mut receiver := ''
 	if node.is_method {
-		mut styp := t.type_to_str(node.receiver.typ)
+		mut styp := util.no_cur_mod(t.type_to_str(node.receiver.typ), cur_mod)
 		mut m := if node.rec_mut { node.receiver.typ.share().str() + ' ' } else { '' }
 		if node.rec_mut {
 			styp = styp[1..] // remove &
 		}
+		styp = util.no_cur_mod(styp, cur_mod)
 		receiver = '($m$node.receiver.name $styp) '
 		/*
 		sym := t.get_type_symbol(node.receiver.typ)
@@ -82,6 +83,7 @@ pub fn (node &FnDecl) stringify(t &table.Table) string {
 				s = s[1..]
 			}
 		}
+		s = util.no_cur_mod(s, cur_mod)
 		if should_add_type {
 			if node.is_variadic && is_last_arg {
 				f.write(' ...' + s)
@@ -97,7 +99,7 @@ pub fn (node &FnDecl) stringify(t &table.Table) string {
 	if node.return_type != table.void_type {
 		// typ := t.type_to_str(node.typ)
 		// if typ.starts_with('
-		f.write(' ' + t.type_to_str(node.return_type))
+		f.write(' ' + util.no_cur_mod(t.type_to_str(node.return_type), cur_mod))
 	}
 	return f.str()
 }
diff --git a/vlib/v/doc/doc.v b/vlib/v/doc/doc.v
index 0290b9f39d..23e5e1dbdd 100644
--- a/vlib/v/doc/doc.v
+++ b/vlib/v/doc/doc.v
@@ -118,7 +118,7 @@ pub fn (mut d Doc) get_signature(stmt ast.Stmt, file &ast.File) string {
 			return 'module $stmt.name'
 		}
 		ast.FnDecl {
-			return stmt.stringify(d.table).replace(d.fmt.cur_mod + '.', '')
+			return stmt.stringify(d.table, d.fmt.cur_mod)
 		}
 		else {
 			d.fmt.out = strings.new_builder(1000)
@@ -307,7 +307,7 @@ fn (mut d Doc) generate() ?Doc {
 		}
 		stmts := file_ast.stmts
 		d.fmt.file = file_ast
-		d.fmt.cur_mod = orig_mod_name
+		d.fmt.set_current_module_name(orig_mod_name)
 		d.fmt.process_file_imports(file_ast)
 		mut last_import_stmt_idx := 0
 		for sidx, stmt in stmts {
diff --git a/vlib/v/fmt/fmt.v b/vlib/v/fmt/fmt.v
index b3f39d8b25..8f39eaffe3 100644
--- a/vlib/v/fmt/fmt.v
+++ b/vlib/v/fmt/fmt.v
@@ -23,9 +23,8 @@ enum CommentsLevel {
 }
 
 pub struct Fmt {
-pub:
-	table             &table.Table
 pub mut:
+	table             &table.Table
 	out_imports       strings.Builder
 	out               strings.Builder
 	out_save          strings.Builder
@@ -64,7 +63,7 @@ pub fn fmt(file ast.File, table &table.Table, is_debug bool) string {
 		is_debug: is_debug
 	}
 	f.process_file_imports(file)
-	f.cur_mod = 'main'
+	f.set_current_module_name('main')
 	for stmt in file.stmts {
 		if stmt is ast.Import {
 			// Just remember the position of the imports for now
@@ -191,8 +190,13 @@ fn (mut f Fmt) adjust_complete_line() {
 	}
 }
 
+pub fn (mut f Fmt) set_current_module_name(cmodname string){
+	f.cur_mod = cmodname
+	f.table.cmod_prefix = cmodname + '.'
+}
+
 pub fn (mut f Fmt) mod(mod ast.Module) {
-	f.cur_mod = mod.name
+	f.set_current_module_name(mod.name)
 	if mod.is_skipped {
 		return
 	}
@@ -427,7 +431,7 @@ pub fn (mut f Fmt) stmt(node ast.Stmt) {
 			f.writeln('interface $it.name {')
 			for method in it.methods {
 				f.write('\t')
-				f.writeln(method.stringify(f.table).after('fn '))
+				f.writeln(method.stringify(f.table, f.cur_mod).after('fn '))
 			}
 			f.writeln('}\n')
 		}
@@ -512,7 +516,7 @@ pub fn (mut f Fmt) type_decl(node ast.TypeDecl) {
 			typ_sym := f.table.get_type_symbol(node.typ)
 			fn_typ_info := typ_sym.info as table.FnType
 			fn_info := fn_typ_info.func
-			fn_name := f.no_cur_mod_anywhere(node.name)
+			fn_name := f.no_cur_mod(node.name)
 			f.write('type $fn_name = fn (')
 			for i, arg in fn_info.args {
 				f.write(arg.name)
@@ -1150,8 +1154,7 @@ pub fn (mut f Fmt) comments(some_comments []ast.Comment, remove_last_new_line bo
 pub fn (mut f Fmt) fn_decl(node ast.FnDecl) {
 	// println('$it.name find_comment($it.pos.line_nr)')
 	// f.find_comment(it.pos.line_nr)
-	s := node.stringify(f.table)
-	f.write(f.no_cur_mod_anywhere(s)) // `Expr` instead of `ast.Expr` in mod ast
+	f.write(node.stringify(f.table, f.cur_mod)) // `Expr` instead of `ast.Expr` in mod ast
 	if node.language == .v {
 		f.writeln(' {')
 		f.stmts(node.stmts)
@@ -1169,28 +1172,8 @@ pub fn (mut f Fmt) fn_decl(node ast.FnDecl) {
 	f.mark_types_module_as_used(node.return_type)
 }
 
-pub fn (mut f Fmt) no_cur_mod_anywhere(typename string) string {
-	return typename.replace(f.cur_mod + '.', '')
-}
-
 pub fn (mut f Fmt) no_cur_mod(typename string) string {
-	mut res := typename
-	map_prefix := 'map[string]'
-	cur_mod := f.cur_mod + '.'
-	has_map_prefix := res.starts_with(map_prefix)
-	if has_map_prefix {
-		res = res.replace(map_prefix, '')
-	}
-	no_symbols := res.trim_left('&[]')
-	should_shorten := no_symbols.starts_with(cur_mod)
-	//	eprintln('> no_cur_mod typename: $typename | cur_mod: $cur_mod | no_symbols: $no_symbols | should_shorten: $should_shorten | res: |$res|')
-	if should_shorten {
-		res = res.replace_once(cur_mod, '')
-	}
-	if has_map_prefix {
-		res = map_prefix + res
-	}
-	return res
+	return util.no_cur_mod(typename, f.cur_mod)
 }
 
 // foo.bar.fn() => bar.fn()
diff --git a/vlib/v/table/atypes.v b/vlib/v/table/atypes.v
index 6b70dbca50..0c69775d1f 100644
--- a/vlib/v/table/atypes.v
+++ b/vlib/v/table/atypes.v
@@ -45,7 +45,7 @@ pub enum TypeFlag {
 	atomic_f
 }
 
-/* 
+/*
 	To save precious TypeFlag bits the 4 possible ShareTypes are coded in the two
 	bits `shared` and `atomic_or_rw` (see sharetype_from_flags() below).
 */
@@ -770,6 +770,9 @@ pub fn (table &Table) type_to_str(t Type) string {
 		if vals.len > 2 {
 			res = vals[vals.len - 2] + '.' + vals[vals.len - 1]
 		}
+		if res.starts_with(table.cmod_prefix) {
+			res = res.replace_once(table.cmod_prefix, '')
+		}
 		if sym.kind == .array && !res.starts_with('[]') {
 			res = '[]' + res
 		}
diff --git a/vlib/v/table/table.v b/vlib/v/table/table.v
index 4b88ffb041..c2b8f8bb66 100644
--- a/vlib/v/table/table.v
+++ b/vlib/v/table/table.v
@@ -17,6 +17,7 @@ pub mut:
 	cflags        []cflag.CFlag
 	redefined_fns []string
 	fn_gen_types  map[string][]Type // for generic functions
+	cmod_prefix   string // needed for table.type_to_str(Type) while vfmt; contains `os.`
 }
 
 pub struct Fn {
diff --git a/vlib/v/util/util.v b/vlib/v/util/util.v
index 53516bbda6..11bda1fcaa 100644
--- a/vlib/v/util/util.v
+++ b/vlib/v/util/util.v
@@ -343,3 +343,26 @@ pub fn strip_main_name(name string) string {
 pub fn no_dots(s string) string {
 	return s.replace('.', '__')
 }
+
+// no_cur_mod - removes cur_mod. prefix from typename,
+// but *only* when it is at the start, i.e.:
+// no_cur_mod('vproto.Abdcdef', 'proto') == 'vproto.Abdcdef'
+// even though proto. is a substring
+pub fn no_cur_mod(typename, cur_mod string) string {
+	mut res := typename
+	map_prefix := 'map[string]'
+	mod_prefix := cur_mod + '.'
+	has_map_prefix := res.starts_with(map_prefix)
+	if has_map_prefix {
+		res = res.replace(map_prefix, '')
+	}
+	no_symbols := res.trim_left('&[]')
+	should_shorten := no_symbols.starts_with(mod_prefix)
+	if should_shorten {
+		res = res.replace_once(mod_prefix, '')
+	}
+	if has_map_prefix {
+		res = map_prefix + res
+	}
+	return res
+}