diff --git a/vlib/builtin/builtin.v b/vlib/builtin/builtin.v
index 7f83d0ef7698f9..ba6c8c8c07055e 100644
--- a/vlib/builtin/builtin.v
+++ b/vlib/builtin/builtin.v
@@ -5,7 +5,7 @@
 module builtin
 
 // isnil returns true if an object is nil (only for C objects).
-@[inline; markused]
+@[inline]
 pub fn isnil(v voidptr) bool {
 	return v == 0
 }
diff --git a/vlib/v/checker/str.v b/vlib/v/checker/str.v
index 75f8ae987426c0..e5cec6f149b728 100644
--- a/vlib/v/checker/str.v
+++ b/vlib/v/checker/str.v
@@ -56,12 +56,12 @@ fn (mut c Checker) string_inter_lit(mut node ast.StringInterLiteral) ast.Type {
 		if c.pref.skip_unused && !c.is_builtin_mod {
 			if !c.table.sym(ftyp).has_method('str') {
 				c.table.used_features.auto_str = true
-				if ftyp.is_ptr() {
-					c.table.used_features.auto_str_ptr = true
-				}
 			} else {
 				c.table.used_features.print_types[ftyp.idx()] = true
 			}
+			if ftyp.is_ptr() {
+				c.table.used_features.auto_str_ptr = true
+			}
 			c.table.used_features.interpolation = true
 		}
 		c.fail_if_unreadable(expr, ftyp, 'interpolation object')
diff --git a/vlib/v/tests/skip_unused/auto_string.run.out b/vlib/v/tests/skip_unused/auto_string.run.out
new file mode 100644
index 00000000000000..4ff935d8a9b1bc
--- /dev/null
+++ b/vlib/v/tests/skip_unused/auto_string.run.out
@@ -0,0 +1,3 @@
+Hello Tom
+C->&Tom
+&1.24
diff --git a/vlib/v/tests/skip_unused/auto_string.skip_unused.run.out b/vlib/v/tests/skip_unused/auto_string.skip_unused.run.out
new file mode 100644
index 00000000000000..4ff935d8a9b1bc
--- /dev/null
+++ b/vlib/v/tests/skip_unused/auto_string.skip_unused.run.out
@@ -0,0 +1,3 @@
+Hello Tom
+C->&Tom
+&1.24
diff --git a/vlib/v/tests/skip_unused/auto_string.vv b/vlib/v/tests/skip_unused/auto_string.vv
new file mode 100644
index 00000000000000..cf10a93c77b34b
--- /dev/null
+++ b/vlib/v/tests/skip_unused/auto_string.vv
@@ -0,0 +1,9 @@
+a := 'Tom'
+b := 'Hello ${a}'
+c := &a
+println(b)
+println('C->${c}')
+
+f := 1.24
+f_p := &f
+println('${f_p}')