diff --git a/sys/cam/scsi/scsi_enc.h b/sys/cam/scsi/scsi_enc.h
index cafec644bde..b816a6a5d4c 100644
--- a/sys/cam/scsi/scsi_enc.h
+++ b/sys/cam/scsi/scsi_enc.h
@@ -154,7 +154,9 @@ typedef enum {
 	"SAS Connector"					\
 }
 
+#ifdef _KERNEL
 extern const char *elm_type_names[];
+#endif
 
 typedef struct encioc_element {
 	/* Element Index */