diff --git a/rbd/rbd.go b/rbd/rbd.go
index e18567e..9cd55d4 100644
--- a/rbd/rbd.go
+++ b/rbd/rbd.go
@@ -843,6 +843,10 @@ func (image *Image) GetParentInfo(p_pool, p_name, p_snapname []byte) error {
 
 // int rbd_snap_remove(rbd_image_t image, const char *snapname);
 func (snapshot *Snapshot) Remove() error {
+	if snapshot.image.image == nil {
+		return RbdErrorImageNotOpen
+	}
+
 	var c_snapname *C.char = C.CString(snapshot.name)
 	defer C.free(unsafe.Pointer(c_snapname))
 
@@ -853,6 +857,10 @@ func (snapshot *Snapshot) Remove() error {
 // int rbd_snap_rollback_with_progress(rbd_image_t image, const char *snapname,
 //                  librbd_progress_fn_t cb, void *cbdata);
 func (snapshot *Snapshot) Rollback() error {
+	if snapshot.image.image == nil {
+		return RbdErrorImageNotOpen
+	}
+
 	var c_snapname *C.char = C.CString(snapshot.name)
 	defer C.free(unsafe.Pointer(c_snapname))
 
@@ -861,6 +869,10 @@ func (snapshot *Snapshot) Rollback() error {
 
 // int rbd_snap_protect(rbd_image_t image, const char *snap_name);
 func (snapshot *Snapshot) Protect() error {
+	if snapshot.image.image == nil {
+		return RbdErrorImageNotOpen
+	}
+
 	var c_snapname *C.char = C.CString(snapshot.name)
 	defer C.free(unsafe.Pointer(c_snapname))
 
@@ -869,6 +881,10 @@ func (snapshot *Snapshot) Protect() error {
 
 // int rbd_snap_unprotect(rbd_image_t image, const char *snap_name);
 func (snapshot *Snapshot) Unprotect() error {
+	if snapshot.image.image == nil {
+		return RbdErrorImageNotOpen
+	}
+
 	var c_snapname *C.char = C.CString(snapshot.name)
 	defer C.free(unsafe.Pointer(c_snapname))
 
@@ -878,6 +894,10 @@ func (snapshot *Snapshot) Unprotect() error {
 // int rbd_snap_is_protected(rbd_image_t image, const char *snap_name,
 //               int *is_protected);
 func (snapshot *Snapshot) IsProtected() (bool, error) {
+	if snapshot.image.image == nil {
+		return false, RbdErrorImageNotOpen
+	}
+
 	var c_is_protected C.int
 	var c_snapname *C.char = C.CString(snapshot.name)
 	defer C.free(unsafe.Pointer(c_snapname))
@@ -893,6 +913,10 @@ func (snapshot *Snapshot) IsProtected() (bool, error) {
 
 // int rbd_snap_set(rbd_image_t image, const char *snapname);
 func (snapshot *Snapshot) Set() error {
+	if snapshot.image.image == nil {
+		return RbdErrorImageNotOpen
+	}
+
 	var c_snapname *C.char = C.CString(snapshot.name)
 	defer C.free(unsafe.Pointer(c_snapname))