diff --git a/vlib/stbi/stbi.v b/vlib/stbi/stbi.v
index bc0022fb3b..53b4331462 100644
--- a/vlib/stbi/stbi.v
+++ b/vlib/stbi/stbi.v
@@ -4,7 +4,6 @@
 
 module stbi
 
-
 #flag -I @VROOT/thirdparty/stb_image
 #include "stb_image.h"
 #flag @VROOT/thirdparty/stb_image/stbi.o
@@ -19,10 +18,15 @@ pub mut:
 	ext         string
 }
 
-fn C.stbi_load() voidptr
-fn C.stbi_load_from_memory() voidptr
-fn C.stbi_image_free()
-fn C.stbi_set_flip_vertically_on_load()
+fn C.stbi_load(filename charptr, x &int, y &int, channels_in_file &int, desired_channels int) byteptr
+
+fn C.stbi_load_from_file(f voidptr, x &int, y &int, channels_in_file &int, desired_channels int) byteptr
+
+fn C.stbi_load_from_memory(buffer byteptr, len int, x &int, y &int, channels_in_file &int, desired_channels int) byteptr
+
+fn C.stbi_image_free(retval_from_stbi_load byteptr)
+
+fn C.stbi_set_flip_vertically_on_load(should_flip int)
 
 fn init() {
 	set_flip_vertically_on_load(false)
@@ -30,13 +34,13 @@ fn init() {
 
 pub fn load(path string) ?Image {
 	ext := path.all_after_last('.')
-	mut res := Image {
+	mut res := Image{
 		ok: true
 		ext: ext
 		data: 0
 	}
 	flag := if ext == 'png' { C.STBI_rgb_alpha } else { 0 }
-	res.data = C.stbi_load(path.str, &res.width, &res.height,	&res.nr_channels, flag)
+	res.data = C.stbi_load(path.str, &res.width, &res.height, &res.nr_channels, flag)
 	if isnil(res.data) {
 		return error('stbi image failed to load from "$path"')
 	}
@@ -44,19 +48,19 @@ pub fn load(path string) ?Image {
 }
 
 pub fn load_from_memory(buf byteptr, bufsize int) ?Image {
-	mut res := Image {
+	mut res := Image{
 		ok: true
 		data: 0
 	}
 	flag := C.STBI_rgb_alpha
-	res.data = C.stbi_load_from_memory(buf, bufsize, &res.width, &res.height, &res.nr_channels, flag)
+	res.data = C.stbi_load_from_memory(buf, bufsize, &res.width, &res.height, &res.nr_channels,
+		flag)
 	if isnil(res.data) {
 		return error('stbi image failed to load from memory')
 	}
 	return res
 }
 
-
 pub fn (img &Image) free() {
 	C.stbi_image_free(img.data)
 }