diff --git a/libasn1parser/asn1p_l.l b/libasn1parser/asn1p_l.l
index 07fa676..50a786c 100644
--- a/libasn1parser/asn1p_l.l
+++ b/libasn1parser/asn1p_l.l
@@ -269,7 +269,7 @@
 CLASS			return TOK_CLASS;
 COMPONENT		return TOK_COMPONENT;
 COMPONENTS		return TOK_COMPONENTS;
-CONSRAINED		return TOK_CONSTRAINED;
+CONSTRAINED		return TOK_CONSTRAINED;
 CONTAINING		return TOK_CONTAINING;
 DEFAULT			return TOK_DEFAULT;
 DEFINED			{