diff --git a/vlib/v/fmt/tests/c_fn_headers_with_comments_expected.vv b/vlib/v/fmt/tests/c_fn_headers_with_comments_expected.vv
new file mode 100644
index 0000000000..95934f8cc5
--- /dev/null
+++ b/vlib/v/fmt/tests/c_fn_headers_with_comments_expected.vv
@@ -0,0 +1,7 @@
+module main
+
+fn main() {
+	println('Hello World!')
+}
+
+fn C.f( /* mut */ buff &char) i64
diff --git a/vlib/v/fmt/tests/c_fn_headers_with_comments_input.vv b/vlib/v/fmt/tests/c_fn_headers_with_comments_input.vv
new file mode 100644
index 0000000000..88945f3ba4
--- /dev/null
+++ b/vlib/v/fmt/tests/c_fn_headers_with_comments_input.vv
@@ -0,0 +1,7 @@
+module main
+
+fn main() {
+	println('Hello World!')
+}
+
+fn C.f(/*mut*/buff &char) i64
diff --git a/vlib/v/parser/fn.v b/vlib/v/parser/fn.v
index f8bf4cd8ab..a16034b4d8 100644
--- a/vlib/v/parser/fn.v
+++ b/vlib/v/parser/fn.v
@@ -948,6 +948,7 @@ fn (mut p Parser) fn_params() ([]ast.Param, bool, bool) {
 				is_mut: is_mut
 				typ: param_type
 				type_pos: type_pos
+				comments: comments
 			}
 			param_no++
 			if param_no > 1024 {