diff --git a/src/draw/sw/lv_draw_sw_transform.c b/src/draw/sw/lv_draw_sw_transform.c
index 76ae001958..edb80f80d7 100644
--- a/src/draw/sw/lv_draw_sw_transform.c
+++ b/src/draw/sw/lv_draw_sw_transform.c
@@ -192,7 +192,7 @@ static void rgb_no_aa(const uint8_t * src, lv_coord_t src_w, lv_coord_t src_h, l
         }
         else {
 
-#if LV_COLOR_DEPTH == 8
+#if LV_COLOR_DEPTH == 8 || LV_COLOR_DEPTH == 1
             const uint8_t * src_tmp = src;
             src_tmp += ys_int * src_stride + xs_int;
             cbuf[x].full = src_tmp[0];
@@ -233,7 +233,7 @@ static void argb_no_aa(const uint8_t * src, lv_coord_t src_w, lv_coord_t src_h,
             const uint8_t * src_tmp = src;
             src_tmp += (ys_int * src_stride * LV_IMG_PX_SIZE_ALPHA_BYTE) + xs_int * LV_IMG_PX_SIZE_ALPHA_BYTE;
 
-#if LV_COLOR_DEPTH == 8
+#if LV_COLOR_DEPTH == 8 || LV_COLOR_DEPTH == 1
             cbuf[x].full = src_tmp[0];
 #elif LV_COLOR_DEPTH == 16
             cbuf[x].full = src_tmp[0] + (src_tmp[1] << 8);
@@ -408,7 +408,7 @@ static void argb_and_rgb_aa(const uint8_t * src, lv_coord_t src_w, lv_coord_t sr
 
                 if(abuf[x] == 0x00) continue;
 
-#if LV_COLOR_DEPTH == 8
+#if LV_COLOR_DEPTH == 8 || LV_COLOR_DEPTH == 1
                 c_base.full = px_base[0];
                 c_ver.full = px_ver[0];
                 c_hor.full = px_hor[0];
@@ -441,7 +441,7 @@ static void argb_and_rgb_aa(const uint8_t * src, lv_coord_t src_w, lv_coord_t sr
         }
         /*Partially out of the image*/
         else {
-#if LV_COLOR_DEPTH == 8
+#if LV_COLOR_DEPTH == 8 || LV_COLOR_DEPTH == 1
             cbuf[x].full = src_tmp[0];
 #elif LV_COLOR_DEPTH == 16
             cbuf[x].full = src_tmp[0] + (src_tmp[1] << 8);