diff --git a/src/tiff/tiffread.c b/src/tiff/tiffread.c
index c976c2b..9a371e8 100644
--- a/src/tiff/tiffread.c
+++ b/src/tiff/tiffread.c
@@ -131,11 +131,13 @@ Image *read_baseline_tiff(const char *file, Arena *arena) {
 
   assert((reader.img.type == TIFF_IMAGE_TYPE_RGB) &&
          "Currently, only RGB images are supported");
-  assert((reader.img.rgba_bits_per_sample.r == MIN_BITS_PER_SAMPLE &&
-          reader.img.rgba_bits_per_sample.g == MIN_BITS_PER_SAMPLE &&
-          reader.img.rgba_bits_per_sample.b == MIN_BITS_PER_SAMPLE &&
-          reader.img.rgba_bits_per_sample.a == MIN_BITS_PER_SAMPLE) &&
-         "Currently, only 8-bit images are supported");
+
+  bool image_is_8_bit =
+      (reader.img.rgba_bits_per_sample.r == MIN_BITS_PER_SAMPLE &&
+       reader.img.rgba_bits_per_sample.g == MIN_BITS_PER_SAMPLE &&
+       reader.img.rgba_bits_per_sample.b == MIN_BITS_PER_SAMPLE &&
+       reader.img.rgba_bits_per_sample.a == MIN_BITS_PER_SAMPLE);
+  assert(image_is_8_bit && "Currently, only 8-bit images are supported");
 
   load_image_pixels(&reader, temp_arena);
   if (!reader.pixels) {