diff --git a/osal/driver/inc/mpp_service_impl.h b/osal/driver/inc/mpp_service_impl.h
index 9c1ab446..063df4e0 100644
--- a/osal/driver/inc/mpp_service_impl.h
+++ b/osal/driver/inc/mpp_service_impl.h
@@ -20,7 +20,7 @@
 #include "mpp_device.h"
 #include "mpp_service.h"
 
-#define MAX_REG_OFFSET          32
+#define MAX_REG_OFFSET          64
 #define MAX_RCB_OFFSET          32
 #define MAX_INFO_COUNT          16
 
diff --git a/osal/driver/mpp_service.c b/osal/driver/mpp_service.c
index 3a328145..4bd9f4bb 100644
--- a/osal/driver/mpp_service.c
+++ b/osal/driver/mpp_service.c
@@ -215,6 +215,8 @@ RegOffsetInfo *mpp_service_next_reg_offset(MppDevMppService *p)
     RegOffsetInfo *info = NULL;
 
     if (p->reg_offset_count + p->reg_offset_pos >= p->reg_offset_max) {
+        RegOffsetInfo *orig = p->reg_offset_info;
+
         mpp_dev_dbg_msg("enlarge reg offset count %d -> %d\n",
                         p->reg_offset_max, p->reg_offset_max * 2);
         p->reg_offset_info = mpp_realloc(p->reg_offset_info, RegOffsetInfo, p->reg_offset_max * 2);
@@ -222,6 +224,8 @@ RegOffsetInfo *mpp_service_next_reg_offset(MppDevMppService *p)
             mpp_err_f("failed to enlarge request buffer\n");
             return NULL;
         }
+        if (orig != p->reg_offset_info)
+            mpp_logw_f("enlarge reg offset buffer and get different pointer\n");
 
         p->reg_offset_max *= 2;
     }