--- a/src/common-image.c
+++ b/src/common-image.c
@@ -161,7 +161,11 @@ struct image * load_image(char const * n
     uint32_t depth = (bpp + 7) / 8;
 
     /* Allocate the pixel buffer */
-    im->pixels = _caca_alloc2d(im->w, im->h, depth);
+    /* _caca_alloc2d is internal to libcaca */
+    if (im->w == 0 || im->h == 0 || SIZE_MAX / im->w / im->h < depth)
+        im->pixels = NULL;
+    else
+        im->pixels = malloc(im->w * im->h * depth);
     if (!im->pixels)
     {
         caca_file_close(f);