diff --git a/lib/asn1/lex.l b/lib/asn1/lex.l
index 5596f5d36..0c117e4ba 100644
--- a/lib/asn1/lex.l
+++ b/lib/asn1/lex.l
@@ -61,6 +61,7 @@ static unsigned lineno = 1;
 
 %%
 INTEGER			{ return INTEGER; }
+BOOLEAN			{ return BOOLEAN; }
 IMPORTS			{ return IMPORTS; }
 FROM			{ return FROM; }
 SEQUENCE		{ return SEQUENCE; }
diff --git a/lib/asn1/parse.y b/lib/asn1/parse.y
index 9b755394b..e350f7c53 100644
--- a/lib/asn1/parse.y
+++ b/lib/asn1/parse.y
@@ -66,6 +66,7 @@ static void append (Member *l, Member *r);
 %token UTF8String NULLTYPE
 %token EXTERNAL DEFAULT
 %token DOTDOT DOTDOTDOT
+%token BOOLEAN
 %token IMPORTS FROM
 %token OBJECT IDENTIFIER
 %token <name> IDENT 
@@ -182,6 +183,7 @@ type		: INTEGER     { $$ = new_type(TInteger); }
 		  $$->subtype = $5;
 		  $$->application = $3;
 		}
+		| BOOLEAN     { $$ = new_type(TBoolean); }
 		;
 
 memberdecls	: { $$ = NULL; }