diff --git a/apps/plugin.h b/apps/plugin.h
index 2fac5ee7e4..d19c696d2b 100644
--- a/apps/plugin.h
+++ b/apps/plugin.h
@@ -271,7 +271,7 @@ struct plugin_api {
     int (*read_line)(int fd, char* buffer, int buffer_size);
     bool (*settings_parseline)(char* line, char** name, char** value);
 #ifndef SIMULATOR
-    int (*ata_sleep)(void);
+    void (*ata_sleep)(void);
 #endif
     
     /* dir */
diff --git a/firmware/drivers/ata.c b/firmware/drivers/ata.c
index 6ec414c5b8..8ee8225d1b 100644
--- a/firmware/drivers/ata.c
+++ b/firmware/drivers/ata.c
@@ -1015,42 +1015,9 @@ static int ata_perform_sleep(void)
     return ret;
 }
 
-int ata_standby(int time)
-{
-    int ret = 0;
-
-    mutex_lock(&ata_mtx);
-
-    SET_REG(ATA_SELECT, ata_device);
-
-    if(!wait_for_rdy()) {
-        DEBUGF("ata_standby() - not RDY\n");
-        mutex_unlock(&ata_mtx);
-        return -1;
-    }
-
-    if(time)
-        /* Round up to nearest 5 secs */
-        SET_REG(ATA_NSECTOR, ((time + 5) / 5) & 0xff);
-    else
-        SET_REG(ATA_NSECTOR, 0); /* Disable standby */
-        
-    SET_REG(ATA_COMMAND, CMD_STANDBY);
-
-    if (!wait_for_rdy())
-    {
-        DEBUGF("ata_standby() - CMD failed\n");
-        ret = -2;
-    }
-
-    mutex_unlock(&ata_mtx);
-    return ret;
-}
-
-int ata_sleep(void)
+void ata_sleep(void)
 {
     queue_post(&ata_queue, Q_SLEEP, NULL);
-    return 0;
 }
 
 void ata_spin(void)
diff --git a/firmware/drivers/ata_mmc.c b/firmware/drivers/ata_mmc.c
index 2e5bd3d78f..f398846387 100644
--- a/firmware/drivers/ata_mmc.c
+++ b/firmware/drivers/ata_mmc.c
@@ -998,16 +998,8 @@ bool ata_disk_is_active(void)
     return mmc_mutex.locked;
 }
 
-int ata_standby(int time)
+void ata_sleep(void)
 {
-    (void)time;
-
-    return 0;
-}
-
-int ata_sleep(void)
-{
-    return 0;
 }
 
 void ata_spin(void)
diff --git a/firmware/export/ata.h b/firmware/export/ata.h
index e9dc54c6fe..83124c6bfa 100644
--- a/firmware/export/ata.h
+++ b/firmware/export/ata.h
@@ -36,22 +36,10 @@
 #define NUM_VOLUMES 1
 #endif
 
-/*
-  ata_spindown() time values:
-   -1     Immediate spindown
-   0      Timeout disabled
-   1-240  (time * 5) seconds
-   241-251((time - 240) * 30) minutes
-   252    21 minutes
-   253    Period between 8 and 12 hrs
-   254    Reserved
-   255    21 min 15 s
-*/
 extern void ata_enable(bool on);
 extern void ata_spindown(int seconds);
 extern void ata_poweroff(bool enable);
-extern int ata_sleep(void);
-extern int ata_standby(int time);
+extern void ata_sleep(void);
 extern bool ata_disk_is_active(void);
 extern int ata_hard_reset(void);
 extern int ata_soft_reset(void);