diff --git a/array_map.v b/array_map.v
index c0c5e7c..0f90a06 100644
--- a/array_map.v
+++ b/array_map.v
@@ -18,15 +18,14 @@ fn (mut app App) array_init(c CompositeLit) {
 			app.gen(len_val)
 		}
 		app.gen(']')
-		app.gen(c.typ.elt.name)
+		app.gen(go2v_type(c.typ.elt.name))
 		app.gen('{}')
 	} else {
 		// [1,2,3]
 		app.gen('[')
 		elt_name := go2v_type(c.typ.elt.name)
 		for i, elt in c.elts {
-			if i == 0 && elt_name != '' && elt_name != 'string' && elt_name != 'int'
-				&& !elt_name.starts_with_capital() {
+			if i == 0 && elt_name != '' && elt_name != 'string' && !elt_name.starts_with_capital() {
 				// specify type in the first element
 				// [u8(1), 2, 3]
 				app.gen('${elt_name}(')
@@ -45,7 +44,7 @@ fn (mut app App) array_init(c CompositeLit) {
 				for _ in 0 .. diff {
 					app.gen(',')
 					match elt_name {
-						'int' { app.gen('0') }
+						'isize', 'usize' { app.gen('0') }
 						'string' { app.gen("''") }
 						else { app.gen('unknown element type??') }
 					}
diff --git a/assign_stmt.v b/assign_stmt.v
index b94f7d2..702f619 100644
--- a/assign_stmt.v
+++ b/assign_stmt.v
@@ -46,13 +46,20 @@ fn (mut app App) gen_append(args []Expr) {
 	}
 
 	for i := 1; i < args.len; i++ {
-		if i == 1 && args[i] is BasicLit {
+		arg_i := args[i]
+		if i == 1 {
 			app.gen('[')
+			if arg_i is BasicLit {
+				app.gen('${go2v_type(arg_i.kind)}(')
+			}
+		}
+		app.expr(arg_i)
+		if i == 1 && arg_i is BasicLit {
+			app.gen(')')
 		}
-		app.expr(args[i])
 		if i < args.len - 1 {
 			app.gen(',')
-		} else if i == args.len - 1 && args[i] is BasicLit {
+		} else if i == args.len - 1 {
 			app.gen(']')
 		}
 	}
diff --git a/expr.v b/expr.v
index 6f53a20..89d0bf5 100644
--- a/expr.v
+++ b/expr.v
@@ -134,7 +134,7 @@ fn (mut app App) key_value_expr(expr KeyValueExpr) {
 
 fn (mut app App) array_type(node ArrayType) {
 	if node.elt is Ident {
-		app.gen('[]${node.elt.name}')
+		app.gen('[]${go2v_type(node.elt.name)}')
 	} else if node.elt is StarExpr {
 		app.gen('[]')
 		app.star_expr(node.elt)
diff --git a/tests/append/append.vv b/tests/append/append.vv
index de1c440..fb48c08 100644
--- a/tests/append/append.vv
+++ b/tests/append/append.vv
@@ -1,10 +1,10 @@
 module main
 
 fn main() {
-	mut s := []int{}
+	mut s := []isize{}
 	s << 1
-	s << [2, 3, 4]
-	mut a := [4, 5, 6]
-	mut b := [1, 2, 3]
+	s << [isize(2), 3, 4]
+	mut a := [isize(4), 5, 6]
+	mut b := [isize(1), 2, 3]
 	b << a
 }
diff --git a/tests/array_fixed_size/array_fixed_size.vv b/tests/array_fixed_size/array_fixed_size.vv
index 5008984..1add9ad 100644
--- a/tests/array_fixed_size/array_fixed_size.vv
+++ b/tests/array_fixed_size/array_fixed_size.vv
@@ -4,10 +4,10 @@ struct Ok {
 }
 
 fn main() {
-	mut full := [4, 5, 23, 55]!
-	mut one_missing := [4, 5, 23, 55, 0]!
+	mut full := [isize(4), 5, 23, 55]!
+	mut one_missing := [isize(4), 5, 23, 55, 0]!
 	mut missing := ['John', 'Paul', 'George', 'Ringo', '', '']!
-	mut missing_empty := [2]int{}
-	mut abc := [1, 2, 3]!
+	mut missing_empty := [2]isize{}
+	mut abc := [isize(1), 2, 3]!
 	mut bytes := [u8(1), 2, 3]!
 }
diff --git a/tests/array_type/array_type.vv b/tests/array_type/array_type.vv
index e516df6..a61111a 100644
--- a/tests/array_type/array_type.vv
+++ b/tests/array_type/array_type.vv
@@ -5,7 +5,7 @@ struct Ok {
 
 fn main() {
 	mut a := [u8(1), 2, 3]
-	mut b := [1, 2, 3]
+	mut b := [isize(1), 2, 3]
 	mut c := ['a', 'b', 'c']
 	mut d := [Ok{}, Ok{}, Ok{}]
 	mut e := [i32(1), 2, 3]
diff --git a/tests/fn/fn.vv b/tests/fn/fn.vv
index 10ee821..e5f323f 100644
--- a/tests/fn/fn.vv
+++ b/tests/fn/fn.vv
@@ -1,4 +1,4 @@
 module main
 
-fn abc(a int, b []string, c rune) string {
+fn abc(a isize, b []string, c rune) string {
 }
diff --git a/tests/fn_embedded_struct/fn_embedded_struct.vv b/tests/fn_embedded_struct/fn_embedded_struct.vv
index 3eac270..06164fb 100644
--- a/tests/fn_embedded_struct/fn_embedded_struct.vv
+++ b/tests/fn_embedded_struct/fn_embedded_struct.vv
@@ -1,10 +1,10 @@
 module main
 
-fn abc(a int, b []string, c Ok) {
+fn abc(a isize, b []string, c Ok) {
 }
 
 struct Ok {
 pub mut:
-	a int
+	a isize
 	b []string
 }
diff --git a/tests/fn_pub/fn_pub.vv b/tests/fn_pub/fn_pub.vv
index 2c6ee09..93b1de9 100644
--- a/tests/fn_pub/fn_pub.vv
+++ b/tests/fn_pub/fn_pub.vv
@@ -1,4 +1,4 @@
 module main
 
-pub fn abc(a int, b []string, c rune) string {
+pub fn abc(a isize, b []string, c rune) string {
 }
diff --git a/tests/fn_return_multiple/fn_return_multiple.vv b/tests/fn_return_multiple/fn_return_multiple.vv
index 8c946cd..9da2707 100644
--- a/tests/fn_return_multiple/fn_return_multiple.vv
+++ b/tests/fn_return_multiple/fn_return_multiple.vv
@@ -1,4 +1,4 @@
 module main
 
-fn abc(a int, b []string, c rune) (int, string, []int) {
+fn abc(a isize, b []string, c rune) (isize, string, []isize) {
 }
diff --git a/tests/for_in/for_in.vv b/tests/for_in/for_in.vv
index c1cb612..fc40581 100644
--- a/tests/for_in/for_in.vv
+++ b/tests/for_in/for_in.vv
@@ -12,8 +12,8 @@ fn main() {
 	for _ in strings {
 		println('hello')
 	}
-	for i, _ in [2]int{} {
-		for j, _ in [2]int{} {
+	for i, _ in [2]isize{} {
+		for j, _ in [2]isize{} {
 			println('hello2')
 		}
 	}
diff --git a/tests/len_cap/len_cap.vv b/tests/len_cap/len_cap.vv
index ac84005..62a8cbe 100644
--- a/tests/len_cap/len_cap.vv
+++ b/tests/len_cap/len_cap.vv
@@ -1,7 +1,7 @@
 module main
 
 fn main() {
-	mut array := [2, 3, 5, 7, 11]
+	mut array := [isize(2), 3, 5, 7, 11]
 	println(array.len)
 	println(array.cap)
 }
diff --git a/tests/method/method.vv b/tests/method/method.vv
index 552eadc..0cb99a2 100644
--- a/tests/method/method.vv
+++ b/tests/method/method.vv
@@ -2,8 +2,8 @@ module main
 
 struct Abc {
 pub mut:
-	a int
+	a isize
 }
 
-fn (a Abc) ok(d int, b []string, c rune) string {
+fn (a Abc) ok(d isize, b []string, c rune) string {
 }
diff --git a/tests/method_embedded/method_embedded.vv b/tests/method_embedded/method_embedded.vv
index 647d6fa..61fafeb 100644
--- a/tests/method_embedded/method_embedded.vv
+++ b/tests/method_embedded/method_embedded.vv
@@ -1,9 +1,9 @@
 module main
 
-fn (a Abc) ok(d int, b []string, c rune) string {
+fn (a Abc) ok(d isize, b []string, c rune) string {
 }
 
 struct Abc {
 pub mut:
-	a int
+	a isize
 }
diff --git a/tests/struct/struct.vv b/tests/struct/struct.vv
index e7d2ff5..f1679ec 100644
--- a/tests/struct/struct.vv
+++ b/tests/struct/struct.vv
@@ -2,6 +2,6 @@ module main
 
 struct Struct1 {
 pub mut:
-	a int
+	a isize
 	b []string
 }
diff --git a/tests/struct_simple/struct_simple.vv b/tests/struct_simple/struct_simple.vv
index 2a668e0..90f3a12 100644
--- a/tests/struct_simple/struct_simple.vv
+++ b/tests/struct_simple/struct_simple.vv
@@ -2,7 +2,7 @@ module main
 
 struct Struct1 {
 pub mut:
-	a int
+	a isize
 	b []string
 }
 
diff --git a/util.v b/util.v
index e1aa8c9..1ea4793 100644
--- a/util.v
+++ b/util.v
@@ -3,10 +3,13 @@
 module main
 
 fn go2v_type(typ string) string {
-	match typ {
+	match typ.to_lower() {
 		'byte' {
 			return 'u8'
 		}
+		'int' {
+			return 'isize'
+		}
 		'int8' {
 			return 'i8'
 		}
@@ -20,7 +23,7 @@ fn go2v_type(typ string) string {
 			return 'i64'
 		}
 		'uint' {
-			return 'u32'
+			return 'usize'
 		}
 		'uint8' {
 			return 'u8'