diff --git a/source/blender/makesrna/intern/rna_image_api.c b/source/blender/makesrna/intern/rna_image_api.c
index 1b50db36a3d..8594bda96d1 100644
--- a/source/blender/makesrna/intern/rna_image_api.c
+++ b/source/blender/makesrna/intern/rna_image_api.c
@@ -200,7 +200,7 @@ static int rna_Image_gl_load(Image *image, ReportList *reports, int filter, int
 	glBindTexture(GL_TEXTURE_2D, *bind);
 
 	if (filter != GL_NEAREST && filter != GL_LINEAR)
-		error = (int)gluBuild2DMipmaps(GL_TEXTURE_2D, GL_RGBA, ibuf->x, ibuf->y, GL_RGBA, GL_UNSIGNED_INT, ibuf->rect);
+		error = (int)gluBuild2DMipmaps(GL_TEXTURE_2D, GL_RGBA, ibuf->x, ibuf->y, GL_RGBA, GL_UNSIGNED_BYTE, ibuf->rect);
 
 	if (!error) {
 		glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, image->tpageflag & IMA_CLAMP_U ? GL_CLAMP : GL_REPEAT);