diff --git a/mie/ctx.c b/mie/ctx.c
index 2b489e8..df6a5e7 100644
--- a/mie/ctx.c
+++ b/mie/ctx.c
@@ -95,7 +95,7 @@ bool mie_ctx_resolve_op(const struct mie_ctx *ctx, struct mie_op *op)
 
 	const struct mie_op_definition *op_info
 		= mie_dialect_get_op(dialect, op_name);
-	if (!op) {
+	if (!op_info) {
 		return false;
 	}