diff --git a/libctru/include/3ds/services/boss.h b/libctru/include/3ds/services/boss.h
index 3b9c68e..6d65906 100644
--- a/libctru/include/3ds/services/boss.h
+++ b/libctru/include/3ds/services/boss.h
@@ -57,6 +57,14 @@ void bossExit(void);
 /// Returns the BOSS session handle.
 Handle bossGetSessionHandle(void);
 
+/**
+ * @brief Set the content data storage location.
+ * @param extdataID u64 extdataID, must have the high word set to the shared-extdata value when it's for NAND.
+ * @param boss_size Probably the max size in the extdata which BOSS can use.
+ * @param mediaType Roughly the same as FS mediatype.
+ */
+Result bossSetStorageInfo(u64 extdataID, u32 boss_size, u8 mediaType);
+
 /**
  * @brief Register a task.
  * @param taskID BOSS taskID.
diff --git a/libctru/source/services/boss.c b/libctru/source/services/boss.c
index f7dc6c0..cc1631d 100644
--- a/libctru/source/services/boss.c
+++ b/libctru/source/services/boss.c
@@ -81,6 +81,22 @@ static Result bossipc_InitializeSession(u64 programID)
 	return (Result)cmdbuf[1];
 }
 
+Result bossSetStorageInfo(u64 extdataID, u32 boss_size, u8 mediaType)
+{
+	Result ret = 0;
+	u32 *cmdbuf = getThreadCommandBuffer();
+
+	cmdbuf[0] = IPC_MakeHeader(0x2,4,0); // 0x20100
+	cmdbuf[1] = (u32) extdataID;
+	cmdbuf[2] = (u32) (extdataID >> 32);
+	cmdbuf[3] = boss_size;
+	cmdbuf[4] = mediaType;
+
+	if(R_FAILED(ret = svcSendSyncRequest(bossHandle)))return ret;
+
+	return (Result)cmdbuf[1];
+}
+
 Result bossRegisterTask(const char *taskID, u8 unk0, u8 unk1)
 {
 	Result ret = 0;