diff --git a/libctru/include/3ds/services/apt.h b/libctru/include/3ds/services/apt.h
index d73dd16..ae961e8 100644
--- a/libctru/include/3ds/services/apt.h
+++ b/libctru/include/3ds/services/apt.h
@@ -135,6 +135,18 @@ void aptWaitStatusEvent(void);
 /// Signals that the app is ready to sleep.
 void aptSignalReadyForSleep(void);
 
+/**
+ * @brief Gets whether to allow the system to enter sleep mode.
+ * @return Whether sleep mode is allowed.
+ */
+bool aptIsSleepAllowed();
+
+/**
+ * @brief Sets whether to allow the system to enter sleep mode.
+ * @param allowed Whether to allow sleep mode.
+ */
+void aptSetSleepAllowed(bool allowed);
+
 /**
  * @brief Gets the menu's app ID.
  * @return The menu's app ID.
diff --git a/libctru/source/services/apt.c b/libctru/source/services/apt.c
index d3554ce..688c16e 100644
--- a/libctru/source/services/apt.c
+++ b/libctru/source/services/apt.c
@@ -37,6 +37,7 @@ APT_AppStatus aptStatus = APP_NOTINITIALIZED;
 APT_AppStatus aptStatusBeforeSleep = APP_NOTINITIALIZED;
 u32 aptStatusPower;
 Handle aptSleepSync;
+static bool aptSleepAllowed = true;
 
 u32 aptParameters[0x1000/4]; //TEMP
 
@@ -336,14 +337,22 @@ static void __handle_notification(void) {
 
 	case APTSIGNAL_PREPARESLEEP:
 		// Reply to sleep-request.
-		aptStatusBeforeSleep = aptGetStatus();
-		aptSetStatus(APP_PREPARE_SLEEPMODE);
-		svcWaitSynchronization(aptSleepSync, U64_MAX);
-		svcClearEvent(aptSleepSync);
+		if(aptIsSleepAllowed())
+		{
+			aptStatusBeforeSleep = aptGetStatus();
+			aptSetStatus(APP_PREPARE_SLEEPMODE);
+			svcWaitSynchronization(aptSleepSync, U64_MAX);
+			svcClearEvent(aptSleepSync);
 		
-		aptOpenSession();
-		APT_ReplySleepQuery(currentAppId, 0x1);
-		aptCloseSession();
+			aptOpenSession();
+			APT_ReplySleepQuery(currentAppId, 0x1);
+			aptCloseSession();
+		} else
+		{
+			aptOpenSession();
+			APT_ReplySleepQuery(currentAppId, 0x0);
+			aptCloseSession();
+		}
 		break;
 
 	case APTSIGNAL_ENTERSLEEP:
@@ -710,6 +719,16 @@ void aptSignalReadyForSleep(void)
 	svcSignalEvent(aptSleepSync);
 }
 
+bool aptIsSleepAllowed()
+{
+	return aptSleepAllowed;
+}
+
+void aptSetSleepAllowed(bool allowed)
+{
+	aptSleepAllowed = allowed;
+}
+
 Result APT_GetLockHandle(u16 flags, Handle* lockHandle)
 {
 	u32* cmdbuf=getThreadCommandBuffer();