diff --git a/sys/cam/ctl/ctl.h b/sys/cam/ctl/ctl.h
--- a/sys/cam/ctl/ctl.h
+++ b/sys/cam/ctl/ctl.h
@@ -129,7 +129,9 @@
 
 #ifdef	_KERNEL
 
+#ifdef MALLOC_DECLARE	/* from malloc.h */
 MALLOC_DECLARE(M_CTL);
+#endif
 
 struct ctl_page_index;
 
@@ -137,9 +139,13 @@
 SYSCTL_DECL(_kern_cam_ctl);
 #endif
 
+struct cdev;
 struct ctl_lun;
 struct ctl_port;
 struct ctl_softc;
+struct ctl_scsiio;
+struct sbuf;
+union ctl_io;
 
 /*
  * Put a string into an sbuf, escaping characters that are illegal or not