diff --git a/firmware/flash_erase.bat b/firmware/flash_erase.bat
index 2e3872e001..aaaf09ceb3 100644
--- a/firmware/flash_erase.bat
+++ b/firmware/flash_erase.bat
@@ -14,6 +14,6 @@ if not exist openocd/openocd.exe echo openocd/openocd.exe NOT FOUND
 if not exist openocd/openocd.exe exit -1
 
 
-openocd\openocd.exe           -f openocd/stm32f429disc1.cfg                                    -c init -c targets -c "halt" -c "flash erase_address 0x08000000 0x080000" -c shutdown
+openocd\openocd.exe           -f openocd/stm32f429disc1.cfg                                    -c init -c targets -c "halt" -c "flash erase_address 0x08000000 0x0100000" -c shutdown
 
 rem openocd-0.8.0.exe -f interface/stlink-v2.cfg -f board/stm32f4discovery.cfg -c init -c targets -c "halt" -c "flash erase_address 0x08000000 0x080000" -c shutdown
\ No newline at end of file
diff --git a/java_console/ui/src/com/rusefi/maintenance/EraseChip.java b/java_console/ui/src/com/rusefi/maintenance/EraseChip.java
index 7870274999..51edcb97c0 100644
--- a/java_console/ui/src/com/rusefi/maintenance/EraseChip.java
+++ b/java_console/ui/src/com/rusefi/maintenance/EraseChip.java
@@ -9,8 +9,9 @@ import java.awt.event.ActionEvent;
 public class EraseChip extends ProcessStatusWindow {
     private final JButton button = new JButton("Erase Chip");
 
+    private static final String FLASH_SIZE = "0x0100000";
     private static final String OPEN_OCD_COMMAND = FirmwareFlasher.OPENOCD_CMD +
-            " -c init -c targets -c \"halt\" -c \"flash erase_address 0x08000000 0x080000\" -c shutdown";
+            " -c init -c targets -c \"halt\" -c \"flash erase_address 0x08000000 " + FLASH_SIZE + "\" -c shutdown";
 
     public EraseChip() {
         button.addActionListener(new AbstractAction() {