diff --git a/sys/cam/scsi/scsi_da.c b/sys/cam/scsi/scsi_da.c
index 3e9246bbd54..2152fa4b4d0 100644
--- a/sys/cam/scsi/scsi_da.c
+++ b/sys/cam/scsi/scsi_da.c
@@ -736,8 +736,10 @@ dadump(dev_t dev)
 		addr += PAGE_SIZE * dumppages;
 
 		/* operator aborting dump? */
-		if (cncheckc() != -1)
+		if (cncheckc() == 0x03)
 			return (EINTR);
+		else
+			printf("[CTRL-C to abort] ");
 	}
 
 	/*
diff --git a/sys/dev/ata/ata-disk.c b/sys/dev/ata/ata-disk.c
index 060ebac03e7..8a4377f943c 100644
--- a/sys/dev/ata/ata-disk.c
+++ b/sys/dev/ata/ata-disk.c
@@ -352,8 +352,10 @@ addump(dev_t dev)
 	blkno += blkcnt * dumppages;
 	count -= blkcnt * dumppages;
 	addr += PAGE_SIZE * dumppages;
-	if (cncheckc() != -1)
+	if (cncheckc() == 0x03)
 	    return EINTR;
+	else
+	    printf("[CTRL-C to abort] ");
     }
 
     if (ata_wait(adp->controller, adp->unit, ATA_S_READY | ATA_S_DSC) < 0)
diff --git a/sys/dev/ida/ida_disk.c b/sys/dev/ida/ida_disk.c
index f307c68c0e8..d2d99f50cd4 100644
--- a/sys/dev/ida/ida_disk.c
+++ b/sys/dev/ida/ida_disk.c
@@ -244,8 +244,10 @@ idad_dump(dev_t dev)
 		count -= blkcnt * dumppages;
 		addr += PAGE_SIZE * dumppages;
 
-		if (cncheckc() != -1)
+		if (cncheckc() == 0x03)
 			return (EINTR);
+		else
+			printf("[CTRL-C to abort] ");
 	}
 	return (0);
 }
diff --git a/sys/dev/twe/twe_freebsd.c b/sys/dev/twe/twe_freebsd.c
index 6efac81487e..d5acfda0d9a 100644
--- a/sys/dev/twe/twe_freebsd.c
+++ b/sys/dev/twe/twe_freebsd.c
@@ -741,8 +741,10 @@ twed_dump(dev_t dev)
 	count -= blkcnt * dumppages;
 	addr += PAGE_SIZE * dumppages;
 	
-	if (cncheckc() != -1)
+	if (cncheckc() == 0x03)
 	    return(EINTR);
+	else
+	    printf("[CTRL-C to abort] ");
     }
     return(0);
 }