diff --git a/fixtures/test_icc_prophoto.jpg b/fixtures/test_icc_prophoto.jpg
new file mode 100644
index 0000000..ebf7f02
Binary files /dev/null and b/fixtures/test_icc_prophoto.jpg differ
diff --git a/metadata_test.go b/metadata_test.go
index 47f270f..b5b9cd6 100644
--- a/metadata_test.go
+++ b/metadata_test.go
@@ -39,6 +39,7 @@ func TestMetadata(t *testing.T) {
 		space       string
 	}{
 		{"test.jpg", "jpeg", 0, false, false, "srgb"},
+		{"test_icc_prophoto.jpg", "jpeg", 0, false, true, "srgb"},
 		{"test.png", "png", 0, true, false, "srgb"},
 		{"test.webp", "webp", 0, false, false, "srgb"},
 	}
diff --git a/vips.h b/vips.h
index 52895ef..1a367fb 100644
--- a/vips.h
+++ b/vips.h
@@ -47,7 +47,7 @@ typedef struct {
 	double Background[3];
 } WatermarkOptions;
 
-static int
+static unsigned long
 has_profile_embed(VipsImage *image) {
 	return vips_image_get_typeof(image, VIPS_META_ICC_NAME);
 }