diff --git a/hw/bsp/ra/family.cmake b/hw/bsp/ra/family.cmake
index 307e01da8..2d079dc94 100644
--- a/hw/bsp/ra/family.cmake
+++ b/hw/bsp/ra/family.cmake
@@ -114,8 +114,9 @@ function(family_configure_example TARGET RTOS)
     # Add TinyUSB target and port source
   family_add_tinyusb(${TARGET} OPT_MCU_RAXXX ${RTOS})
   target_sources(${TARGET}-tinyusb PUBLIC
-    ${TOP}/src/portable/renesas/rusb2/dcd_rusb2.c
-    ${TOP}/src/portable/renesas/rusb2/hcd_rusb2.c
+  ${TOP}/src/portable/renesas/rusb2/dcd_rusb2.c
+  ${TOP}/src/portable/renesas/rusb2/hcd_rusb2.c
+  ${TOP}/src/portable/renesas/rusb2/rusb2_ra.c
     )
   target_link_libraries(${TARGET}-tinyusb PUBLIC board_${BOARD})
 
diff --git a/hw/bsp/ra/family.mk b/hw/bsp/ra/family.mk
index cf8e5d9e9..3394d41b4 100644
--- a/hw/bsp/ra/family.mk
+++ b/hw/bsp/ra/family.mk
@@ -32,6 +32,7 @@ endif
 SRC_C += \
 	src/portable/renesas/rusb2/dcd_rusb2.c \
 	src/portable/renesas/rusb2/hcd_rusb2.c \
+	src/portable/renesas/rusb2/rusb2_ra.c \
 	$(FSP_RA)/src/bsp/cmsis/Device/RENESAS/Source/startup.c \
 	$(FSP_RA)/src/bsp/cmsis/Device/RENESAS/Source/system.c \
 	$(FSP_RA)/src/bsp/mcu/all/bsp_clocks.c \
diff --git a/src/portable/renesas/rusb2/dcd_rusb2.c b/src/portable/renesas/rusb2/dcd_rusb2.c
index 9a3983f56..3ec1b70b5 100644
--- a/src/portable/renesas/rusb2/dcd_rusb2.c
+++ b/src/portable/renesas/rusb2/dcd_rusb2.c
@@ -50,11 +50,6 @@
     #define D0FIFOCTR_b CFIFOCTR_b
   #endif
 
-  // Application API for setting IRQ number
-  void tud_rusb2_set_irqnum(uint8_t rhport, int32_t irqnum) {
-    rusb2_controller[rhport].irqnum = irqnum;
-  }
-
 #else
   #error "Unsupported MCU"
 #endif
diff --git a/src/portable/renesas/rusb2/rusb2_ra.c b/src/portable/renesas/rusb2/rusb2_ra.c
new file mode 100644
index 000000000..bbffd712e
--- /dev/null
+++ b/src/portable/renesas/rusb2/rusb2_ra.c
@@ -0,0 +1,16 @@
+#include "tusb_option.h"
+#include "device/dcd.h"
+#include "rusb2_type.h"
+#include "rusb2_ra.h"
+
+rusb2_controller_t rusb2_controller[] = {
+    { .reg_base = R_USB_FS0_BASE, .irqnum = USBFS_INT_IRQn },
+    #ifdef RUSB2_SUPPORT_HIGHSPEED
+    { .reg_base = R_USB_HS0_BASE, .irqnum = USBHS_USB_INT_RESUME_IRQn },
+    #endif
+};
+
+// Application API for setting IRQ number
+void tud_rusb2_set_irqnum(uint8_t rhport, int32_t irqnum) {
+    rusb2_controller[rhport].irqnum = irqnum;
+}
\ No newline at end of file
diff --git a/src/portable/renesas/rusb2/rusb2_ra.h b/src/portable/renesas/rusb2/rusb2_ra.h
index 7ff272bbc..4774d2e2c 100644
--- a/src/portable/renesas/rusb2/rusb2_ra.h
+++ b/src/portable/renesas/rusb2/rusb2_ra.h
@@ -74,14 +74,7 @@ typedef struct {
   #define rusb2_is_highspeed_reg(_reg)   (false)
 #endif
 
-// USBFS_INT_IRQn and USBHS_USB_INT_RESUME_IRQn are generated by FSP
-static rusb2_controller_t rusb2_controller[] = {
-    { .reg_base = R_USB_FS0_BASE, .irqnum = USBFS_INT_IRQn },
-    #ifdef RUSB2_SUPPORT_HIGHSPEED
-    { .reg_base = R_USB_HS0_BASE, .irqnum = USBHS_USB_INT_RESUME_IRQn },
-    #endif
-};
-
+extern rusb2_controller_t rusb2_controller[];
 #define RUSB2_REG(_p)      ((rusb2_reg_t*) rusb2_controller[_p].reg_base)
 
 //--------------------------------------------------------------------+