--- a/src/mps/drv_mps_vmmc_linux.c
+++ b/src/mps/drv_mps_vmmc_linux.c
@@ -104,6 +104,10 @@ extern irqreturn_t ifx_mps_vc_irq (IFX_i
 extern IFX_void_t ifx_mps_shutdown (IFX_void_t);
 extern IFX_int32_t ifx_mps_event_activation_poll (mps_devices type,
                                                   MbxEventRegs_s * act);
+extern unsigned int ltq_get_mps_ad0_irq(void);
+extern unsigned int ltq_get_mps_ad1_irq(void);
+extern unsigned int ltq_get_mps_vc_irq(int idx);
+
 mps_mbx_dev *ifx_mps_get_device (mps_devices type);
 
 #ifdef CONFIG_PROC_FS
@@ -2260,7 +2264,7 @@ IFX_int32_t __init ifx_mps_init_module (
    /* reset the device before initializing the device driver */
    ifx_mps_reset ();
 
-  result = request_irq (INT_NUM_IM4_IRL18,
+  result = request_irq (ltq_get_mps_ad0_irq(),
 #ifdef LINUX_2_6
                          ifx_mps_ad0_irq, 0x0
 #else /* */
@@ -2270,7 +2274,7 @@ IFX_int32_t __init ifx_mps_init_module (
                          , "mps_mbx ad0", &ifx_mps_dev);
    if (result)
       return result;
-   result = request_irq (INT_NUM_IM4_IRL19,
+   result = request_irq (ltq_get_mps_ad1_irq(),
 #ifdef LINUX_2_6
                          ifx_mps_ad1_irq, 0x0
 #else /* */
@@ -2285,7 +2289,7 @@ IFX_int32_t __init ifx_mps_init_module (
    for (i = 0; i < 4; ++i)
    {
       sprintf (&voice_channel_int_name[i][0], "mps_mbx vc%d", i);
-      result = request_irq (INT_NUM_IM4_IRL14 + i,
+      result = request_irq (ltq_get_mps_vc_irq(i),
 #ifdef LINUX_2_6
                             ifx_mps_vc_irq, 0x0
 #else /* */
@@ -2446,13 +2450,13 @@ ifx_mps_cleanup_module (IFX_void_t)
    ifx_mps_release_structures (&ifx_mps_dev);
 
    /* release all interrupts at the system */
-   free_irq (INT_NUM_IM4_IRL18, &ifx_mps_dev);
-   free_irq (INT_NUM_IM4_IRL19, &ifx_mps_dev);
+   free_irq (ltq_get_mps_ad0_irq(), &ifx_mps_dev);
+   free_irq (ltq_get_mps_ad1_irq(), &ifx_mps_dev);
 
    /* register status interrupts for voice channels */
    for (i = 0; i < 4; ++i)
    {
-      free_irq (INT_NUM_IM4_IRL14 + i, &ifx_mps_dev);
+      free_irq (ltq_get_mps_vc_irq(i), &ifx_mps_dev);
    }
 #ifdef CONFIG_PROC_FS
 #if CONFIG_MPS_HISTORY_SIZE > 0
--- a/src/mps/drv_mps_vmmc_common.c
+++ b/src/mps/drv_mps_vmmc_common.c
@@ -134,6 +134,8 @@ extern IFX_void_t mask_and_ack_danube_ir
 
 #endif /* */
 
+extern unsigned int ltq_get_mps_vc_irq(int idx);
+
 extern void sys_hw_setup (void);
 
 extern IFXOS_event_t fw_ready_evt;
@@ -2979,7 +2981,7 @@ irqreturn_t ifx_mps_ad1_irq (IFX_int32_t
  */
 irqreturn_t ifx_mps_vc_irq (IFX_int32_t irq, mps_comm_dev * pDev)
 {
-   IFX_uint32_t chan = irq - INT_NUM_IM4_IRL14;
+   IFX_uint32_t chan = irq - ltq_get_mps_vc_irq(0);
    mps_mbx_dev *mbx_dev = (mps_mbx_dev *) & (pMPSDev->voice_mb[chan]);
    MPS_VCStatReg_u MPS_VCStatusReg;
    MbxEventRegs_s events;
--- a/src/mps/drv_mps_vmmc_device.h
+++ b/src/mps/drv_mps_vmmc_device.h
@@ -69,9 +69,6 @@
 #  define IFX_MPS_CVC3SR      IFXMIPS_MPS_CVC3SR
 #  define IFX_MPS_SAD0SR      IFXMIPS_MPS_SAD0SR
 /* interrupt vectors */
-#  define INT_NUM_IM4_IRL14   (INT_NUM_IM4_IRL0 + 14)
-#  define INT_NUM_IM4_IRL18   (INT_NUM_IM4_IRL0 + 18)
-#  define INT_NUM_IM4_IRL19   (INT_NUM_IM4_IRL0 + 19)
 #  define IFX_ICU_IM4_IER     IFXMIPS_ICU_IM4_IER
 
 /* ============================= */