diff --git a/android/olm-sdk/src/main/java/org/matrix/olm/OlmAccount.java b/android/olm-sdk/src/main/java/org/matrix/olm/OlmAccount.java
index 0b4c567..3e8c63e 100644
--- a/android/olm-sdk/src/main/java/org/matrix/olm/OlmAccount.java
+++ b/android/olm-sdk/src/main/java/org/matrix/olm/OlmAccount.java
@@ -493,4 +493,22 @@ public class OlmAccount extends CommonSerializeUtils implements Serializable {
     }
 
     private native byte[] fallbackKeyJni();
+
+
+    /**
+     * Forget about the old fallback key.
+     *
+     * This should be called once you are reasonably certain that you will not
+     * receive any more messages that use the old fallback key (e.g. 5 minutes
+     * after the new fallback key has been published).
+     **/
+    public void forgetFallbackKey() throws OlmException {
+        try {
+            forgetFallbackKeyJni();
+        } catch (Exception e) {
+            throw new OlmException(OlmException.EXCEPTION_CODE_ACCOUNT_FORGET_FALLBACK_KEY, e.getMessage());
+        }
+    }
+
+    private native void forgetFallbackKeyJni();
 }
diff --git a/android/olm-sdk/src/main/java/org/matrix/olm/OlmException.java b/android/olm-sdk/src/main/java/org/matrix/olm/OlmException.java
index 0739e9c..26da005 100644
--- a/android/olm-sdk/src/main/java/org/matrix/olm/OlmException.java
+++ b/android/olm-sdk/src/main/java/org/matrix/olm/OlmException.java
@@ -37,6 +37,7 @@ public class OlmException extends IOException {
     public static final int EXCEPTION_CODE_ACCOUNT_SIGN_MESSAGE = 107;
     public static final int EXCEPTION_CODE_ACCOUNT_GENERATE_FALLBACK_KEY = 108;
     public static final int EXCEPTION_CODE_ACCOUNT_FALLBACK_KEY = 109;
+    public static final int EXCEPTION_CODE_ACCOUNT_FORGET_FALLBACK_KEY = 110;
 
     public static final int EXCEPTION_CODE_CREATE_INBOUND_GROUP_SESSION = 200;
     public static final int EXCEPTION_CODE_INIT_INBOUND_GROUP_SESSION = 201;
diff --git a/android/olm-sdk/src/main/jni/olm_account.cpp b/android/olm-sdk/src/main/jni/olm_account.cpp
index 2be982d..d3a42e1 100644
--- a/android/olm-sdk/src/main/jni/olm_account.cpp
+++ b/android/olm-sdk/src/main/jni/olm_account.cpp
@@ -521,7 +521,7 @@ JNIEXPORT jbyteArray OLM_ACCOUNT_FUNC_DEF(fallbackKeyJni)(JNIEnv *env, jobject t
     else
     {
         // keys memory allocation
-        size_t keysLength = olm_account_fallback_key_length(accountPtr);
+        size_t keysLength = olm_account_unpublished_fallback_key_length(accountPtr);
         uint8_t *keysBytesPtr = (uint8_t *)malloc(keysLength*sizeof(uint8_t));
 
         if (!keysBytesPtr)
@@ -532,7 +532,7 @@ JNIEXPORT jbyteArray OLM_ACCOUNT_FUNC_DEF(fallbackKeyJni)(JNIEnv *env, jobject t
         else
         {
             // retrieve key pairs in keysBytesPtr
-            size_t keysResult = olm_account_fallback_key(accountPtr, keysBytesPtr, keysLength);
+            size_t keysResult = olm_account_unpublished_fallback_key(accountPtr, keysBytesPtr, keysLength);
 
             if (keysResult == olm_error()) {
                 LOGE("## fallbackKeyJni(): failure - error getting fallback key Msg=%s",(const char *)olm_account_last_error(accountPtr));
@@ -567,6 +567,29 @@ JNIEXPORT jbyteArray OLM_ACCOUNT_FUNC_DEF(fallbackKeyJni)(JNIEnv *env, jobject t
     return byteArrayRetValue;
 }
 
+
+/**
+ * Forget about the old fallback key.
+ *
+ * This should be called once you are reasonably certain that you will not
+ * receive any more messages that use the old fallback key (e.g. 5 minutes
+ * after the new fallback key has been published).
+ **/
+JNIEXPORT void OLM_ACCOUNT_FUNC_DEF(forgetFallbackKeyJni)(JNIEnv *env, jobject thiz)
+{
+    OlmAccount *accountPtr = getAccountInstanceId(env, thiz);
+
+    if (!accountPtr)
+    {
+        LOGE("## forgetFallbackKeyJni(): failure - invalid Account ptr");
+        errorMessage = "invalid Account ptr";
+    }
+    else
+    {
+       olm_account_forget_old_fallback_key(accountPtr)
+    }
+}
+
 /**
  * Sign a message with the ed25519 key (fingerprint) for this account.<br>
  * The signed message is returned by the function.
diff --git a/android/olm-sdk/src/main/jni/olm_account.h b/android/olm-sdk/src/main/jni/olm_account.h
index caf83c6..09053c8 100644
--- a/android/olm-sdk/src/main/jni/olm_account.h
+++ b/android/olm-sdk/src/main/jni/olm_account.h
@@ -45,6 +45,7 @@ JNIEXPORT void OLM_ACCOUNT_FUNC_DEF(markOneTimeKeysAsPublishedJni)(JNIEnv *env,
 // fallback keys
 JNIEXPORT void OLM_ACCOUNT_FUNC_DEF(generateFallbackKeyJni)(JNIEnv *env, jobject thiz);
 JNIEXPORT jbyteArray OLM_ACCOUNT_FUNC_DEF(fallbackKeyJni)(JNIEnv *env, jobject thiz);
+JNIEXPORT void OLM_ACCOUNT_FUNC_DEF(forgetFallbackKeyJni)(JNIEnv *env, jobject thiz);
 
 // signing
 JNIEXPORT jbyteArray OLM_ACCOUNT_FUNC_DEF(signMessageJni)(JNIEnv *env, jobject thiz, jbyteArray aMessage);