diff --git a/fs_mgr/libsnapshot/include/libsnapshot/snapshot.h b/fs_mgr/libsnapshot/include/libsnapshot/snapshot.h
index 03e9eef..ce979cf 100644
--- a/fs_mgr/libsnapshot/include/libsnapshot/snapshot.h
+++ b/fs_mgr/libsnapshot/include/libsnapshot/snapshot.h
@@ -23,7 +23,6 @@
 
 #include <android-base/unique_fd.h>
 #include <libdm/dm_target.h>
-#include <libfiemap/image_manager.h>
 
 #ifndef FRIEND_TEST
 #define FRIEND_TEST(test_set_name, individual_test) \
@@ -32,6 +31,11 @@
 #endif
 
 namespace android {
+
+namespace fiemap {
+class IImageManager;
+}  // namespace fiemap
+
 namespace snapshot {
 
 enum class UpdateState {
@@ -69,6 +73,8 @@
         virtual bool IsRunningSnapshot() const = 0;
     };
 
+    ~SnapshotManager();
+
     // Return a new SnapshotManager instance, or null on error. The device
     // pointer is owned for the lifetime of SnapshotManager. If null, a default
     // instance will be created.
diff --git a/fs_mgr/libsnapshot/snapshot.cpp b/fs_mgr/libsnapshot/snapshot.cpp
index 7d36b06..7542d82 100644
--- a/fs_mgr/libsnapshot/snapshot.cpp
+++ b/fs_mgr/libsnapshot/snapshot.cpp
@@ -26,6 +26,7 @@
 #include <android-base/unique_fd.h>
 #include <ext4_utils/ext4_utils.h>
 #include <libdm/dm.h>
+#include <libfiemap/image_manager.h>
 
 namespace android {
 namespace snapshot {
@@ -57,6 +58,10 @@
     return true;
 }
 
+// Note: IIMageManager is an incomplete type in the header, so the default
+// destructor doesn't work.
+SnapshotManager::~SnapshotManager() {}
+
 std::unique_ptr<SnapshotManager> SnapshotManager::New(IDeviceInfo* info) {
     if (!info) {
         info = new DeviceInfo();
diff --git a/fs_mgr/libsnapshot/snapshot_test.cpp b/fs_mgr/libsnapshot/snapshot_test.cpp
index 38ba364..1b3289b 100644
--- a/fs_mgr/libsnapshot/snapshot_test.cpp
+++ b/fs_mgr/libsnapshot/snapshot_test.cpp
@@ -24,6 +24,7 @@
 
 #include <android-base/strings.h>
 #include <gtest/gtest.h>
+#include <libfiemap/image_manager.h>
 
 namespace android {
 namespace snapshot {