diff --git a/firmware/export/as3525.h b/firmware/export/as3525.h
index c5e01d5bc8..bad88a20e3 100644
--- a/firmware/export/as3525.h
+++ b/firmware/export/as3525.h
@@ -223,6 +223,7 @@ CE lines
 /* --- are disabled after reset --- */
 #define CGU_EXTMEM_CLOCK_ENABLE              ( 1 << 27 ) /* external memory */
 #define CGU_EXTMEMIF_CLOCK_ENABLE            ( 1 << 26 ) /* ext mem AHB IF */
+#define CGU_ROM_ENABLE                       ( 1 << 24 ) /* internal ROM */
 #define CGU_DMA_CLOCK_ENABLE                 ( 1 << 22 ) /* dma */
 #define CGU_USB_CLOCK_ENABLE                 ( 1 << 21 ) /* usb */
 #define CGU_I2SOUT_APB_CLOCK_ENABLE          ( 1 << 20 ) /* i2sout */
diff --git a/firmware/target/arm/as3525/system-as3525.c b/firmware/target/arm/as3525/system-as3525.c
index 31d6fb6ae6..dcea7a2a2e 100644
--- a/firmware/target/arm/as3525/system-as3525.c
+++ b/firmware/target/arm/as3525/system-as3525.c
@@ -224,7 +224,7 @@ void system_init(void)
     CGU_PERI &= ~0x7f;      /* pclk 24 MHz */
 #endif
 
-    CGU_PERI &= ~(1<<24);   /*disable built in boot rom clock*/
+    CGU_PERI &= ~CGU_ROM_ENABLE;   /*disable built in boot rom clock*/
 
     /* bits 31:30 should be set to 0 in arm926-ejs */
     asm volatile(
@@ -316,6 +316,9 @@ void system_reboot(void)
 
     disable_irq();
 
+    /* re-enable internal ROM */
+    CGU_PERI |= CGU_ROM_ENABLE;
+
     /* use watchdog to reset */
     CGU_PERI |= (CGU_WDOCNT_CLOCK_ENABLE | CGU_WDOIF_CLOCK_ENABLE);
     WDT_LOAD = 1; /* set counter to 1 */