diff --git a/vlib/v/gen/c/cgen.v b/vlib/v/gen/c/cgen.v
index 1cc5860c19..0edbeb1997 100644
--- a/vlib/v/gen/c/cgen.v
+++ b/vlib/v/gen/c/cgen.v
@@ -5210,7 +5210,7 @@ fn (mut g Gen) const_decl_precomputed(mod string, name string, ct_value ast.Comp
 		}
 		rune {
 			rune_code := u32(ct_value)
-			if rune_code <= 255 {
+			if rune_code <= 127 {
 				if rune_code in [`"`, `\\`, `'`] {
 					return false
 				}
diff --git a/vlib/v/tests/high_ascii_const_rune_test.v b/vlib/v/tests/high_ascii_const_rune_test.v
new file mode 100644
index 0000000000..1f4ad05066
--- /dev/null
+++ b/vlib/v/tests/high_ascii_const_rune_test.v
@@ -0,0 +1,5 @@
+const accented = `á`
+
+fn test_high_ascii_const() {
+	assert u32(accented) == 225
+}