diff --git a/arch/arm/src/cxd56xx/cxd56_cisif.c b/arch/arm/src/cxd56xx/cxd56_cisif.c
index ae15e288f00..0aa17cd5ea3 100644
--- a/arch/arm/src/cxd56xx/cxd56_cisif.c
+++ b/arch/arm/src/cxd56xx/cxd56_cisif.c
@@ -256,7 +256,6 @@ const struct imgdata_ops_s g_cxd56_cisif_ops =
   {
     .init                   = cxd56_cisif_init,
     .uninit                 = cxd56_cisif_uninit,
-    .validate_buf           = cxd56_cisif_validate_buf,
     .set_buf                = cxd56_cisif_set_buf,
     .validate_frame_setting = cxd56_cisif_validate_frame_setting,
     .start_capture          = cxd56_cisif_start_capture,
diff --git a/arch/sim/src/sim/sim_video.c b/arch/sim/src/sim/sim_video.c
index c762ae3c01d..ad341f2587a 100644
--- a/arch/sim/src/sim/sim_video.c
+++ b/arch/sim/src/sim/sim_video.c
@@ -103,7 +103,6 @@ static const struct imgdata_ops_s g_sim_video_data_ops =
 {
   .init                     = sim_video_data_init,
   .uninit                   = sim_video_data_uninit,
-  .validate_buf             = sim_video_data_validate_buf,
   .set_buf                  = sim_video_data_set_buf,
   .validate_frame_setting   = sim_video_data_validate_frame_setting,
   .start_capture            = sim_video_data_start_capture,
diff --git a/include/nuttx/video/imgdata.h b/include/nuttx/video/imgdata.h
index e1ecab7034b..095b4d842fc 100644
--- a/include/nuttx/video/imgdata.h
+++ b/include/nuttx/video/imgdata.h
@@ -73,7 +73,6 @@ struct imgdata_ops_s
   CODE int (*init)(void);
   CODE int (*uninit)(void);
 
-  CODE int (*validate_buf)(uint8_t *addr, uint32_t size);
   CODE int (*set_buf)(uint8_t *addr, uint32_t size);
 
   CODE int (*validate_frame_setting)(uint8_t nr_datafmts,