diff --git a/vlib/v/checker/checker.v b/vlib/v/checker/checker.v
index 9425ab0bb4..e98941e368 100644
--- a/vlib/v/checker/checker.v
+++ b/vlib/v/checker/checker.v
@@ -2442,6 +2442,9 @@ pub fn (mut c Checker) return_stmt(mut return_stmt ast.Return) {
 pub fn (mut c Checker) const_decl(mut node ast.ConstDecl) {
 	mut field_names := []string{}
 	mut field_order := []int{}
+	if node.fields.len == 0 {
+		c.warn('const block must have at least 1 declaration', node.pos)
+	}
 	for i, field in node.fields {
 		// TODO Check const name once the syntax is decided
 		if field.name in c.const_names {