diff --git a/Devmapper.h b/Devmapper.h
index 5b65b53..dcc39d8 100644
--- a/Devmapper.h
+++ b/Devmapper.h
@@ -27,6 +27,7 @@
     static int create(const char *name, const char *loopFile, const char *key,
                       unsigned long numSectors, char *buffer, size_t len);
     static int destroy(const char *name);
+    static int destroyAll();
     static int lookupActive(const char *name, char *buffer, size_t len);
     static int dumpState(SocketClient *c);