diff --git a/sys/cam/scsi/scsi_cd.c b/sys/cam/scsi/scsi_cd.c
index 8795fc52b934..a64d93e41743 100644
--- a/sys/cam/scsi/scsi_cd.c
+++ b/sys/cam/scsi/scsi_cd.c
@@ -591,6 +591,7 @@ cdsysctlinit(void *context, int pending)
 
 	if (softc->sysctl_tree == NULL) {
 		printf("cdsysctlinit: unable to allocate sysctl tree\n");
+		mtx_unlock(&Giant);
 		return;
 	}
 
diff --git a/sys/cam/scsi/scsi_da.c b/sys/cam/scsi/scsi_da.c
index bc16d8be8985..c09740967c23 100644
--- a/sys/cam/scsi/scsi_da.c
+++ b/sys/cam/scsi/scsi_da.c
@@ -1001,6 +1001,7 @@ dasysctlinit(void *context, int pending)
 		CTLFLAG_RD, 0, tmpstr);
 	if (softc->sysctl_tree == NULL) {
 		printf("dasysctlinit: unable to allocate sysctl tree\n");
+		mtx_unlock(&Giant);
 		return;
 	}