diff --git a/parse.y b/parse.y
index 1b1a249..41bb2e5 100644
--- a/parse.y
+++ b/parse.y
@@ -35,6 +35,8 @@
 
 #include "calmwm.h"
 
+#define YYSTYPE_IS_DECLARED
+
 TAILQ_HEAD(files, file)		 files = TAILQ_HEAD_INITIALIZER(files);
 static struct file {
 	TAILQ_ENTRY(file)	 entry;