diff --git a/vlib/v/parser/fn.v b/vlib/v/parser/fn.v
index 9639f52790..9f735bbced 100644
--- a/vlib/v/parser/fn.v
+++ b/vlib/v/parser/fn.v
@@ -191,7 +191,7 @@ fn (mut p Parser) fn_decl() ast.FnDecl {
 			name = p.prepend_mod(name)
 		}
 		if _ := p.table.find_fn(name) {
-			p.error('redefinition of `$name`')
+			p.error('redefinition of function `$name`')
 		}
 		p.table.register_fn(table.Fn{
 			name: name
diff --git a/vlib/v/parser/for.v b/vlib/v/parser/for.v
index 3d6e8b3198..5ca4e2815b 100644
--- a/vlib/v/parser/for.v
+++ b/vlib/v/parser/for.v
@@ -74,21 +74,21 @@ fn (mut p Parser) for_stmt() ast.Stmt {
 			key_var_name = val_var_name
 			val_var_name = p.check_name()
 			if p.scope.known_var(key_var_name) {
-				p.error('redefinition of `$key_var_name`')
+				p.error('redefinition of key iteration variable `$key_var_name`')
 			}
 			if p.scope.known_var(val_var_name) {
-				p.error('redefinition of `$val_var_name`')
+				p.error('redefinition of value iteration variable `$val_var_name`')
 			}
 			p.scope.register(key_var_name, ast.Var{
 				name: key_var_name
 				typ: table.int_type
 			})
 		} else if p.scope.known_var(val_var_name) {
-			p.error('redefinition of `$val_var_name`')
+			p.error('redefinition of value iteration variable `$val_var_name`')
 		}
 		p.check(.key_in)
 		if p.tok.kind == .name && p.tok.lit in [key_var_name, val_var_name] {
-			p.error('redefinition of `$p.tok.lit`')
+			p.error('in a `for x in array` loop, the key or value iteration variable `$p.tok.lit` can not be the same as the array variable')
 		}
 		// arr_expr
 		cond := p.expr(0)