diff --git a/apps/main.c b/apps/main.c
index b1a5091f1a..c570fbcbad 100644
--- a/apps/main.c
+++ b/apps/main.c
@@ -650,7 +650,7 @@ static void init(void)
 #ifdef HAVE_MULTIDRIVE
             for (int i = 0 ; i < NUM_DRIVES ; i++)
 #endif
-                disk_set_sector_multiplier(IF_MD(i,) DEFAULT_VIRT_SECTOR_SIZE);
+                disk_set_sector_multiplier(IF_MD(i,) DEFAULT_VIRT_SECTOR_SIZE/SECTOR_SIZE);
 #endif
 
 #ifndef USB_NONE
diff --git a/bootloader/ipod-s5l87xx.c b/bootloader/ipod-s5l87xx.c
index 9d5949db6b..2c24245cff 100644
--- a/bootloader/ipod-s5l87xx.c
+++ b/bootloader/ipod-s5l87xx.c
@@ -422,7 +422,7 @@ void main(void)
 #ifdef HAVE_MULTIDRIVE
             for (int i = 0 ; i < NUM_DRIVES ; i++)
 #endif
-                disk_set_sector_multiplier(IF_MD(i,) DEFAULT_VIRT_SECTOR_SIZE);
+                disk_set_sector_multiplier(IF_MD(i,) DEFAULT_VIRT_SECTOR_SIZE/SECTOR_SIZE);
 #endif
         usb_mode();
     }
diff --git a/bootloader/ipod.c b/bootloader/ipod.c
index 4234a67e61..c7ea3ac340 100644
--- a/bootloader/ipod.c
+++ b/bootloader/ipod.c
@@ -206,7 +206,7 @@ void fatal_error(void)
 #ifdef HAVE_MULTIDRIVE
             for (int i = 0 ; i < NUM_DRIVES ; i++)
 #endif
-                disk_set_sector_multiplier(IF_MD(i,) DEFAULT_VIRT_SECTOR_SIZE);
+                disk_set_sector_multiplier(IF_MD(i,) DEFAULT_VIRT_SECTOR_SIZE/SECTOR_SIZE);
 #endif
 
     usb_init();