diff --git a/testing/drivertest/drivertest_framebuffer.c b/testing/drivertest/drivertest_framebuffer.c
index 0db0d61de..0e9d45e03 100644
--- a/testing/drivertest/drivertest_framebuffer.c
+++ b/testing/drivertest/drivertest_framebuffer.c
@@ -208,8 +208,8 @@ static void draw_rect(FAR struct fb_info_s *fb_info, int x, int y,
   int i = 0;
   int j = 0;
   int offset = 0;
-  uint32_t *fb_bpp32 = fb_info->fb_mem;
-  uint16_t *fb_bpp16 = fb_info->fb_mem;
+  uint32_t *fb_bpp32 = (uint32_t *)fb_info->fb_mem;
+  uint16_t *fb_bpp16 = (uint16_t *)fb_info->fb_mem;
   const uint8_t bpp = fb_info->plane_info.bpp;
   const uint32_t xres = fb_info->video_info.xres;
   const uint32_t yres = fb_info->video_info.yres;
diff --git a/testing/drivertest/drivertest_lcd.c b/testing/drivertest/drivertest_lcd.c
index 494b9d80c..a4b0d7583 100644
--- a/testing/drivertest/drivertest_lcd.c
+++ b/testing/drivertest/drivertest_lcd.c
@@ -231,8 +231,8 @@ static void draw_rect(FAR struct lcd_info_s *lcd_info, int x, int y,
   draw_area.col_end = y + valid_h - 1;
   draw_area.data = malloc(valid_w * valid_h * (bpp >> 3));
   assert_ptr_not_equal(draw_area.data, NULL);
-  fb_bpp16 = draw_area.data;
-  fb_bpp32 = draw_area.data;
+  fb_bpp16 = (uint16_t *)draw_area.data;
+  fb_bpp32 = (uint32_t *)draw_area.data;
   for (j = 0; j <= (draw_area.col_end - draw_area.col_start); j++)
     {
       offset = j  * valid_w;