diff --git a/src/image.c b/src/image.c
index a901290..22ab06f 100644
--- a/src/image.c
+++ b/src/image.c
@@ -82,10 +82,10 @@ static uint32_t bayer_matrix[256] = {
 };
 
 static cammy_image_color default_palette[4] = {
-    {   0,   0,   0, 0 },
-    {  87,  87,  87, 0 },
-    { 171, 171, 171, 0 },
-    { 255, 255, 255, 0 }
+    {   0,   0,   0, 255 },
+    {  87,  87,  87, 255 },
+    { 171, 171, 171, 255 },
+    { 255, 255, 255, 255 }
 };
 
 static uint8_t rgb_to_luma(uint8_t r, uint8_t g, uint8_t b) {