diff --git a/compiler/fn.v b/compiler/fn.v
index a98536a7b8..a7df439f76 100644
--- a/compiler/fn.v
+++ b/compiler/fn.v
@@ -695,35 +695,32 @@ fn (p mut Parser) fn_call_args(f *Fn) *Fn {
 			T := p.table.find_type(typ)
 			fmt := p.typ_to_fmt(typ) 
 			if fmt != '' { 
-				p.cgen.cur_line = p.cgen.cur_line.replace('println (', '/*opt*/printf ("' + fmt + '", ')    
+				p.cgen.cur_line = p.cgen.cur_line.replace('println (', '/*opt*/printf ("' + fmt + '\\n", ')    
 				continue 
 			}  
-			if T.parent == 'int' {
-				p.cgen.set_placeholder(ph, 'int_str(')
-			}
-			else if typ.ends_with('*') {
+			if typ.ends_with('*') {
 				p.cgen.set_placeholder(ph, 'ptr_str(')
+				p.gen(')')
+				continue 
 			}
-			else {
-				// Make sure this type has a `str()` method
-				if !T.has_method('str') {
-					if T.fields.len > 0 {
-						mut index := p.cgen.cur_line.len - 1
-						for index > 0 && p.cgen.cur_line[index] != ` ` { index-- }
-						name := p.cgen.cur_line.right(index + 1)
-						if name == '}' {
-							p.error('`$typ` needs to have method `str() string` to be printable')
-						}
-						p.cgen.cur_line = p.cgen.cur_line.left(index)
-						p.create_type_string(T, name)
-						p.cgen.cur_line.replace(typ, '')
-						p.next()
-						return p.fn_call_args(f)
+			// Make sure this type has a `str()` method
+			if !T.has_method('str') {
+				if T.fields.len > 0 {
+					mut index := p.cgen.cur_line.len - 1
+					for index > 0 && p.cgen.cur_line[index] != ` ` { index-- }
+					name := p.cgen.cur_line.right(index + 1)
+					if name == '}' {
+						p.error('`$typ` needs to have method `str() string` to be printable')
 					}
-					p.error('`$typ` needs to have method `str() string` to be printable')
+					p.cgen.cur_line = p.cgen.cur_line.left(index)
+					p.create_type_string(T, name)
+					p.cgen.cur_line.replace(typ, '')
+					p.next()
+					return p.fn_call_args(f)
 				}
-				p.cgen.set_placeholder(ph, '${typ}_str(')
+				p.error('`$typ` needs to have method `str() string` to be printable')
 			}
+			p.cgen.set_placeholder(ph, '${typ}_str(')
 			p.gen(')')
 			continue
 		}
diff --git a/compiler/parser.v b/compiler/parser.v
index e8affa1bd3..c1e887f990 100644
--- a/compiler/parser.v
+++ b/compiler/parser.v
@@ -2127,20 +2127,15 @@ fn format_str(str string) string {
 
 fn (p mut Parser) typ_to_fmt(typ string) string {
 	t := p.table.find_type(typ)
-	if t.parent == 'int' {
+	if t.is_enum { 
 		return '%d'
 	}
 	switch typ {
 	case 'string': return '%.*s'
 	case 'ustring': return '%.*s'
-	case 'byte': return '%d'
-	case 'int': return '%d'
-	case 'char': return '%d'
-	case 'byte': return '%d'
-	case 'bool': return '%d'
-	case 'u32': return '%d'
+	case 'byte', 'int', 'char', 'byte', 'bool', 'u32', 'i32', 'i16', 'u16', 'i8', 'u8': return '%d'
 	case 'f64', 'f32': return '%f'
-	case 'i64': return '%lld'
+	case 'i64', 'u64': return '%lld'
 	case 'byte*', 'byteptr': return '%s'
 		// case 'array_string': return '%s'
 		// case 'array_int': return '%s'
@@ -2213,7 +2208,7 @@ fn (p mut Parser) string_expr() {
 			p.next()
 		}
 		else {
-			f := p.typ_to_fmt(typ)
+			f := p.typ_to_fmt(typ) 
 			if f == '' { 
 				p.error('unhandled sprintf format "$typ" ')
 			}