diff --git a/vlib/v/checker/check_types.v b/vlib/v/checker/check_types.v
index 41556588fa..8a608ad8e7 100644
--- a/vlib/v/checker/check_types.v
+++ b/vlib/v/checker/check_types.v
@@ -102,7 +102,7 @@ pub fn (c &Checker) check_basic(got, expected table.Type) bool {
 		return true
 	}
 	// sum type
-	if c.table.check_sumtype_compatibility(got, expected) {
+	if c.check_sumtype_compatibility(got, expected) {
 		return true
 	}
 	// fn type
@@ -346,3 +346,13 @@ pub fn (c &Checker) string_inter_lit(mut node ast.StringInterLiteral) table.Type
 	}
 	return table.string_type
 }
+
+pub fn (c &Checker) check_sumtype_compatibility(a table.Type, b table.Type) bool {
+	if c.table.sumtype_has_variant(a, b) {
+		return true
+	}
+	if c.table.sumtype_has_variant(b, a) {
+		return true
+	}
+	return false
+}
diff --git a/vlib/v/checker/checker.v b/vlib/v/checker/checker.v
index ab797c704e..cdb2202a7d 100644
--- a/vlib/v/checker/checker.v
+++ b/vlib/v/checker/checker.v
@@ -2462,7 +2462,7 @@ pub fn (mut c Checker) match_expr(mut node ast.MatchExpr) table.Type {
 			typ_sym := c.table.get_type_symbol(typ)
 			if node.is_sum_type || node.is_interface {
 				ok := if cond_type_sym.kind == .sum_type {
-					c.table.check_sumtype_has_variant(cond_type, typ)
+					c.table.sumtype_has_variant(cond_type, typ)
 				} else {
 					// interface match
 					c.type_implements(typ, cond_type, node.pos)
diff --git a/vlib/v/gen/cgen.v b/vlib/v/gen/cgen.v
index 381dd5e8ae..22fc63c6c2 100644
--- a/vlib/v/gen/cgen.v
+++ b/vlib/v/gen/cgen.v
@@ -949,7 +949,7 @@ fn (mut g Gen) for_in(it ast.ForInStmt) {
 fn (mut g Gen) expr_with_cast(expr ast.Expr, got_type, expected_type table.Type) {
 	// cast to sum type
 	if expected_type != table.void_type {
-		if g.table.check_sumtype_has_variant(expected_type, got_type) {
+		if g.table.sumtype_has_variant(expected_type, got_type) {
 			got_sym := g.table.get_type_symbol(got_type)
 			got_styp := g.typ(got_type)
 			exp_styp := g.typ(expected_type)
diff --git a/vlib/v/table/table.v b/vlib/v/table/table.v
index 715981c08e..04eb6c3288 100644
--- a/vlib/v/table/table.v
+++ b/vlib/v/table/table.v
@@ -495,7 +495,7 @@ pub fn (table &Table) register_fn_gen_type(fn_name string, typ Type) {
 
 // TODO: there is a bug when casting sumtype the other way if its pointer
 // so until fixed at least show v (not C) error `x(variant) =  y(SumType*)`
-pub fn (table &Table) check_sumtype_has_variant(parent Type, variant Type) bool {
+pub fn (table &Table) sumtype_has_variant(parent Type, variant Type) bool {
 	parent_sym := table.get_type_symbol(parent)
 	if parent_sym.kind ==.sum_type {
 		parent_info := parent_sym.info as SumType
@@ -503,7 +503,7 @@ pub fn (table &Table) check_sumtype_has_variant(parent Type, variant Type) bool
 			if v.idx() == variant.idx() {
 				return true
 			}
-			if table.check_sumtype_has_variant(v, variant) {
+			if table.sumtype_has_variant(v, variant) {
 				return true
 			}
 		}
@@ -511,12 +511,3 @@ pub fn (table &Table) check_sumtype_has_variant(parent Type, variant Type) bool
 	return false
 }
 
-pub fn (table &Table) check_sumtype_compatibility(a Type, b Type) bool {
-	if table.check_sumtype_has_variant(a, b) {
-		return true
-	}
-	if table.check_sumtype_has_variant(b, a) {
-		return true
-	}
-	return false
-}