diff --git a/vlib/v/gen/c/array.v b/vlib/v/gen/c/array.v
index 34a7446b87..ecf6fdbfb4 100644
--- a/vlib/v/gen/c/array.v
+++ b/vlib/v/gen/c/array.v
@@ -700,50 +700,97 @@ fn (mut g Gen) gen_array_contains_methods() {
 			continue
 		}
 		done << t
-		mut left_type_str := g.typ(t)
-		fn_name := '${left_type_str}_contains'
-		left_info := left_final_sym.info as ast.Array
-		mut elem_type_str := g.typ(left_info.elem_type)
-		elem_sym := g.table.sym(left_info.elem_type)
-		if elem_sym.kind == .function {
-			left_type_str = 'Array_voidptr'
-			elem_type_str = 'voidptr'
+		if left_final_sym.kind == .array {
+			mut left_type_str := g.typ(t)
+			fn_name := '${left_type_str}_contains'
+			left_info := left_final_sym.info as ast.Array
+			mut elem_type_str := g.typ(left_info.elem_type)
+			elem_sym := g.table.sym(left_info.elem_type)
+			if elem_sym.kind == .function {
+				left_type_str = 'Array_voidptr'
+				elem_type_str = 'voidptr'
+			}
+			g.type_definitions.writeln('static bool ${fn_name}($left_type_str a, $elem_type_str v); // auto')
+			mut fn_builder := strings.new_builder(512)
+			fn_builder.writeln('static bool ${fn_name}($left_type_str a, $elem_type_str v) {')
+			fn_builder.writeln('\tfor (int i = 0; i < a.len; ++i) {')
+			if elem_sym.kind == .string {
+				fn_builder.writeln('\t\tif (fast_string_eq(((string*)a.data)[i], v)) {')
+			} else if elem_sym.kind == .array && left_info.elem_type.nr_muls() == 0 {
+				ptr_typ := g.equality_fn(left_info.elem_type)
+				fn_builder.writeln('\t\tif (${ptr_typ}_arr_eq((($elem_type_str*)a.data)[i], v)) {')
+			} else if elem_sym.kind == .function {
+				fn_builder.writeln('\t\tif (((voidptr*)a.data)[i] == v) {')
+			} else if elem_sym.kind == .map && left_info.elem_type.nr_muls() == 0 {
+				ptr_typ := g.equality_fn(left_info.elem_type)
+				fn_builder.writeln('\t\tif (${ptr_typ}_map_eq((($elem_type_str*)a.data)[i], v)) {')
+			} else if elem_sym.kind == .struct_ && left_info.elem_type.nr_muls() == 0 {
+				ptr_typ := g.equality_fn(left_info.elem_type)
+				fn_builder.writeln('\t\tif (${ptr_typ}_struct_eq((($elem_type_str*)a.data)[i], v)) {')
+			} else if elem_sym.kind == .interface_ && left_info.elem_type.nr_muls() == 0 {
+				ptr_typ := g.equality_fn(left_info.elem_type)
+				fn_builder.writeln('\t\tif (${ptr_typ}_interface_eq((($elem_type_str*)a.data)[i], v)) {')
+			} else if elem_sym.kind == .sum_type && left_info.elem_type.nr_muls() == 0 {
+				ptr_typ := g.equality_fn(left_info.elem_type)
+				fn_builder.writeln('\t\tif (${ptr_typ}_sumtype_eq((($elem_type_str*)a.data)[i], v)) {')
+			} else if elem_sym.kind == .alias && left_info.elem_type.nr_muls() == 0 {
+				ptr_typ := g.equality_fn(left_info.elem_type)
+				fn_builder.writeln('\t\tif (${ptr_typ}_alias_eq((($elem_type_str*)a.data)[i], v)) {')
+			} else {
+				fn_builder.writeln('\t\tif ((($elem_type_str*)a.data)[i] == v) {')
+			}
+			fn_builder.writeln('\t\t\treturn true;')
+			fn_builder.writeln('\t\t}')
+			fn_builder.writeln('\t}')
+			fn_builder.writeln('\treturn false;')
+			fn_builder.writeln('}')
+			g.auto_fn_definitions << fn_builder.str()
+		} else if left_final_sym.kind == .array_fixed {
+			mut left_type_str := g.typ(t)
+			fn_name := '${left_type_str}_contains'
+			left_info := left_final_sym.info as ast.ArrayFixed
+			mut elem_type_str := g.typ(left_info.elem_type)
+			elem_sym := g.table.sym(left_info.elem_type)
+			if elem_sym.kind == .function {
+				left_type_str = 'Array_voidptr'
+				elem_type_str = 'voidptr'
+			}
+			g.type_definitions.writeln('static bool ${fn_name}($left_type_str a, $elem_type_str v); // auto')
+			mut fn_builder := strings.new_builder(512)
+			fn_builder.writeln('static bool ${fn_name}($left_type_str a, $elem_type_str v) {')
+			fn_builder.writeln('\tfor (int i = 0; i < $left_info.size; ++i) {')
+			if elem_sym.kind == .string {
+				fn_builder.writeln('\t\tif (fast_string_eq(a[i], v)) {')
+			} else if elem_sym.kind == .array && left_info.elem_type.nr_muls() == 0 {
+				ptr_typ := g.equality_fn(left_info.elem_type)
+				fn_builder.writeln('\t\tif (${ptr_typ}_arr_eq(a[i], v)) {')
+			} else if elem_sym.kind == .function {
+				fn_builder.writeln('\t\tif (a[i] == v) {')
+			} else if elem_sym.kind == .map && left_info.elem_type.nr_muls() == 0 {
+				ptr_typ := g.equality_fn(left_info.elem_type)
+				fn_builder.writeln('\t\tif (${ptr_typ}_map_eq(a[i], v)) {')
+			} else if elem_sym.kind == .struct_ && left_info.elem_type.nr_muls() == 0 {
+				ptr_typ := g.equality_fn(left_info.elem_type)
+				fn_builder.writeln('\t\tif (${ptr_typ}_struct_eq(a[i], v)) {')
+			} else if elem_sym.kind == .interface_ && left_info.elem_type.nr_muls() == 0 {
+				ptr_typ := g.equality_fn(left_info.elem_type)
+				fn_builder.writeln('\t\tif (${ptr_typ}_interface_eq(a[i], v)) {')
+			} else if elem_sym.kind == .sum_type && left_info.elem_type.nr_muls() == 0 {
+				ptr_typ := g.equality_fn(left_info.elem_type)
+				fn_builder.writeln('\t\tif (${ptr_typ}_sumtype_eq(a[i], v)) {')
+			} else if elem_sym.kind == .alias && left_info.elem_type.nr_muls() == 0 {
+				ptr_typ := g.equality_fn(left_info.elem_type)
+				fn_builder.writeln('\t\tif (${ptr_typ}_alias_eq(a[i], v)) {')
+			} else {
+				fn_builder.writeln('\t\tif (a[i] == v) {')
+			}
+			fn_builder.writeln('\t\t\treturn true;')
+			fn_builder.writeln('\t\t}')
+			fn_builder.writeln('\t}')
+			fn_builder.writeln('\treturn false;')
+			fn_builder.writeln('}')
+			g.auto_fn_definitions << fn_builder.str()
 		}
-		g.type_definitions.writeln('static bool ${fn_name}($left_type_str a, $elem_type_str v); // auto')
-		mut fn_builder := strings.new_builder(512)
-		fn_builder.writeln('static bool ${fn_name}($left_type_str a, $elem_type_str v) {')
-		fn_builder.writeln('\tfor (int i = 0; i < a.len; ++i) {')
-		if elem_sym.kind == .string {
-			fn_builder.writeln('\t\tif (fast_string_eq(((string*)a.data)[i], v)) {')
-		} else if elem_sym.kind == .array && left_info.elem_type.nr_muls() == 0 {
-			ptr_typ := g.equality_fn(left_info.elem_type)
-			fn_builder.writeln('\t\tif (${ptr_typ}_arr_eq((($elem_type_str*)a.data)[i], v)) {')
-		} else if elem_sym.kind == .function {
-			fn_builder.writeln('\t\tif (((voidptr*)a.data)[i] == v) {')
-		} else if elem_sym.kind == .map && left_info.elem_type.nr_muls() == 0 {
-			ptr_typ := g.equality_fn(left_info.elem_type)
-			fn_builder.writeln('\t\tif (${ptr_typ}_map_eq((($elem_type_str*)a.data)[i], v)) {')
-		} else if elem_sym.kind == .struct_ && left_info.elem_type.nr_muls() == 0 {
-			ptr_typ := g.equality_fn(left_info.elem_type)
-			fn_builder.writeln('\t\tif (${ptr_typ}_struct_eq((($elem_type_str*)a.data)[i], v)) {')
-		} else if elem_sym.kind == .interface_ && left_info.elem_type.nr_muls() == 0 {
-			ptr_typ := g.equality_fn(left_info.elem_type)
-			fn_builder.writeln('\t\tif (${ptr_typ}_interface_eq((($elem_type_str*)a.data)[i], v)) {')
-		} else if elem_sym.kind == .sum_type && left_info.elem_type.nr_muls() == 0 {
-			ptr_typ := g.equality_fn(left_info.elem_type)
-			fn_builder.writeln('\t\tif (${ptr_typ}_sumtype_eq((($elem_type_str*)a.data)[i], v)) {')
-		} else if elem_sym.kind == .alias && left_info.elem_type.nr_muls() == 0 {
-			ptr_typ := g.equality_fn(left_info.elem_type)
-			fn_builder.writeln('\t\tif (${ptr_typ}_alias_eq((($elem_type_str*)a.data)[i], v)) {')
-		} else {
-			fn_builder.writeln('\t\tif ((($elem_type_str*)a.data)[i] == v) {')
-		}
-		fn_builder.writeln('\t\t\treturn true;')
-		fn_builder.writeln('\t\t}')
-		fn_builder.writeln('\t}')
-		fn_builder.writeln('\treturn false;')
-		fn_builder.writeln('}')
-		g.auto_fn_definitions << fn_builder.str()
 	}
 }
 
diff --git a/vlib/v/gen/c/infix.v b/vlib/v/gen/c/infix.v
index 1a717e875a..608d11d9dc 100644
--- a/vlib/v/gen/c/infix.v
+++ b/vlib/v/gen/c/infix.v
@@ -472,7 +472,7 @@ fn (mut g Gen) infix_expr_in_op(node ast.InfixExpr) {
 				return
 			}
 		}
-		if right.sym.info is ast.Array {
+		if right.sym.info is ast.ArrayFixed {
 			elem_type := right.sym.info.elem_type
 			elem_type_ := g.unwrap(elem_type)
 			if elem_type_.sym.kind == .sum_type {
diff --git a/vlib/v/tests/fixed_array_in_op_test.v b/vlib/v/tests/fixed_array_in_op_test.v
index 767df764a8..3b4f1a96e7 100644
--- a/vlib/v/tests/fixed_array_in_op_test.v
+++ b/vlib/v/tests/fixed_array_in_op_test.v
@@ -5,4 +5,14 @@ fn test_fixed_array_in_op() {
 
 	ch := `"`
 	assert ch in [`"`, `'`]!
+
+	fixed_arr := [1, 2, 3]!
+
+	b1 := 2 in fixed_arr
+	println(b1)
+	assert b1
+
+	b2 := 5 !in fixed_arr
+	println(b2)
+	assert b2
 }