diff --git a/vlib/v/gen/c/dumpexpr.v b/vlib/v/gen/c/dumpexpr.v
index 96044445d9..9e8a1df1d0 100644
--- a/vlib/v/gen/c/dumpexpr.v
+++ b/vlib/v/gen/c/dumpexpr.v
@@ -74,6 +74,9 @@ fn (mut g Gen) dump_expr_definitions() {
 			surrounder.add('\tstring value = ${to_string_fn_name}();', '\tstring_free(&value);')
 		} else if dump_sym.kind == .none_ {
 			surrounder.add('\tstring value = _SLIT("none");', '\tstring_free(&value);')
+		} else if is_ptr {
+			surrounder.add('\tstring value = (dump_arg == NULL) ? _SLIT("nil") : ${to_string_fn_name}(${deref}dump_arg);',
+				'\tstring_free(&value);')
 		} else {
 			surrounder.add('\tstring value = ${to_string_fn_name}(${deref}dump_arg);',
 				'\tstring_free(&value);')
diff --git a/vlib/v/tests/inout/dump_nil_voidptr.out b/vlib/v/tests/inout/dump_nil_voidptr.out
new file mode 100644
index 0000000000..be5cde440c
--- /dev/null
+++ b/vlib/v/tests/inout/dump_nil_voidptr.out
@@ -0,0 +1,2 @@
+[vlib/v/tests/inout/dump_nil_voidptr.vv:11] a: &nil
+[vlib/v/tests/inout/dump_nil_voidptr.vv:13] a: &nil
diff --git a/vlib/v/tests/inout/dump_nil_voidptr.vv b/vlib/v/tests/inout/dump_nil_voidptr.vv
new file mode 100644
index 0000000000..3f3dac554d
--- /dev/null
+++ b/vlib/v/tests/inout/dump_nil_voidptr.vv
@@ -0,0 +1,14 @@
+fn get_nil() ?&int {
+	return unsafe { nil }
+}
+
+fn get_voidptr() ?&int {
+	return voidptr(0)
+}
+
+fn main() {
+	mut a := get_nil()?
+	dump(a)
+	a = get_voidptr()?
+	dump(a)
+}