diff --git a/sys/kern/subr_intr.c b/sys/kern/subr_intr.c
--- a/sys/kern/subr_intr.c
+++ b/sys/kern/subr_intr.c
@@ -81,8 +81,6 @@
 #include "pic_if.h"
 #include "msi_if.h"
 
-#define	INTRNAME_LEN	(2*MAXCOMLEN + 1)
-
 #ifdef DEBUG
 #define debugf(fmt, args...) do { printf("%s(): ", __func__);	\
     printf(fmt,##args); } while (0)
@@ -475,7 +473,7 @@
 	isrc->isrc_flags = flags;
 
 	va_start(ap, fmt);
-	vsnprintf(isrc->isrc_name, INTR_ISRC_NAMELEN, fmt, ap);
+	vsnprintf(isrc->isrc_name, INTRNAME_LEN, fmt, ap);
 	va_end(ap);
 
 	mtx_lock(&isrc_table_lock);
diff --git a/sys/sys/intr.h b/sys/sys/intr.h
--- a/sys/sys/intr.h
+++ b/sys/sys/intr.h
@@ -71,7 +71,7 @@
 #endif
 typedef int intr_child_irq_filter_t(void *arg, uintptr_t irq);
 
-#define INTR_ISRC_NAMELEN	(MAXCOMLEN + 1)
+#define INTRNAME_LEN	(MAXCOMLEN + 1)
 
 #define INTR_ISRCF_IPI		0x01	/* IPI interrupt */
 #define INTR_ISRCF_PPI		0x02	/* PPI interrupt */
@@ -84,7 +84,7 @@
 	device_t		isrc_dev;	/* where isrc is mapped */
 	u_int			isrc_irq;	/* unique identificator */
 	u_int			isrc_flags;
-	char			isrc_name[INTR_ISRC_NAMELEN];
+	char			isrc_name[INTRNAME_LEN];
 	cpuset_t		isrc_cpu;	/* on which CPUs is enabled */
 	u_int			isrc_index;
 	u_long *		isrc_count;