diff --git a/src/scan.l b/src/scan.l
index ddf32b28..4071eee8 100644
--- a/src/scan.l
+++ b/src/scan.l
@@ -14,6 +14,7 @@ struct parser_control {
 
 %%
 
+[ \t\n\r]	/* skip whitespace */
 "("	return tLPAREN;
 ")"	return tRPAREN;
 [1-9][0-9]*	{ yylval.datum = pic_int_value(atoi(yytext)); return tINT; }