diff --git a/libvips/foreign/libnsgif/libnsgif.c b/libvips/foreign/libnsgif/libnsgif.c
index 382ae33f..429bcd1a 100644
--- a/libvips/foreign/libnsgif/libnsgif.c
+++ b/libvips/foreign/libnsgif/libnsgif.c
@@ -82,8 +82,8 @@ gif_initialise_sprite(gif_animation *gif,
                       unsigned int width,
                       unsigned int height)
 {
-	/* Already allocated? */
-	if (gif->frame_image) {
+        /* Already allocated? */
+        if (gif->frame_image) {
                 return GIF_OK;
         }
 
@@ -378,12 +378,12 @@ static gif_result gif_initialise_frame(gif_animation *gif)
         gif->frames[frame].redraw_required = ((gif->frames[frame].disposal_method == GIF_FRAME_CLEAR) ||
                                                 (gif->frames[frame].disposal_method == GIF_FRAME_RESTORE));
 
-	/* Frame size may have grown.
-	 */
-        gif->width = (offset_x + width > gif->width) ? 
-		offset_x + width : gif->width;
-        gif->height = (offset_y + height > gif->height) ? 
-		offset_y + height : gif->height;
+        /* Frame size may have grown.
+         */
+        gif->width = (offset_x + width > gif->width) ?
+                        offset_x + width : gif->width;
+        gif->height = (offset_y + height > gif->height) ?
+                        offset_y + height : gif->height;
 
         /* Decode the flags */
         flags = gif_data[9];
@@ -878,9 +878,9 @@ gif_internal_decode_frame(gif_animation *gif,
                 goto gif_decode_frame_exit;
         }
 
-	/* Make sure we have a buffer to decode to.
-	 */
-	if (gif_initialise_sprite(gif, gif->width, gif->height)) {
+        /* Make sure we have a buffer to decode to.
+         */
+        if (gif_initialise_sprite(gif, gif->width, gif->height)) {
                 return GIF_INSUFFICIENT_MEMORY;
         }
 
diff --git a/libvips/foreign/libnsgif/patches/delay-alloc.patch b/libvips/foreign/libnsgif/patches/delay-alloc.patch
deleted file mode 100644
index 21630f2b..00000000
--- a/libvips/foreign/libnsgif/patches/delay-alloc.patch
+++ /dev/null
@@ -1,86 +0,0 @@
---- libnsgif-orig.c	2021-04-03 12:23:43.700260070 +0100
-+++ libnsgif.c	2021-04-03 12:24:44.079567702 +0100
-@@ -79,34 +79,17 @@
-                       unsigned int width,
-                       unsigned int height)
- {
--        unsigned int max_width;
--        unsigned int max_height;
--        struct bitmap *buffer;
--
--        /* Check if we've changed */
--        if ((width <= gif->width) && (height <= gif->height)) {
-+	/* Already allocated? */
-+	if (gif->frame_image) {
-                 return GIF_OK;
-         }
- 
--        /* Get our maximum values */
--        max_width = (width > gif->width) ? width : gif->width;
--        max_height = (height > gif->height) ? height : gif->height;
--
--        /* Allocate some more memory */
-         assert(gif->bitmap_callbacks.bitmap_create);
--        buffer = gif->bitmap_callbacks.bitmap_create(max_width, max_height);
--        if (buffer == NULL) {
-+        gif->frame_image = gif->bitmap_callbacks.bitmap_create(width, height);
-+        if (gif->frame_image == NULL) {
-                 return GIF_INSUFFICIENT_MEMORY;
-         }
- 
--        assert(gif->bitmap_callbacks.bitmap_destroy);
--        gif->bitmap_callbacks.bitmap_destroy(gif->frame_image);
--        gif->frame_image = buffer;
--        gif->width = max_width;
--        gif->height = max_height;
--
--        /* Invalidate our currently decoded image */
--        gif->decoded_frame = GIF_INVALID_FRAME;
-         return GIF_OK;
- }
- 
-@@ -392,10 +375,12 @@
-         gif->frames[frame].redraw_required = ((gif->frames[frame].disposal_method == GIF_FRAME_CLEAR) ||
-                                                 (gif->frames[frame].disposal_method == GIF_FRAME_RESTORE));
- 
--        /* Boundary checking - shouldn't ever happen except with junk data */
--        if (gif_initialise_sprite(gif, (offset_x + width), (offset_y + height))) {
--                return GIF_INSUFFICIENT_MEMORY;
--        }
-+	/* Frame size may have grown.
-+	 */
-+        gif->width = (offset_x + width > gif->width) ? 
-+		offset_x + width : gif->width;
-+        gif->height = (offset_y + height > gif->height) ? 
-+		offset_y + height : gif->height;
- 
-         /* Decode the flags */
-         flags = gif_data[9];
-@@ -739,6 +724,12 @@
-                 goto gif_decode_frame_exit;
-         }
- 
-+	/* Make sure we have a buffer to decode to.
-+	 */
-+	if (gif_initialise_sprite(gif, gif->width, gif->height)) {
-+                return GIF_INSUFFICIENT_MEMORY;
-+        }
-+
-         /* Decode the flags */
-         flags = gif_data[9];
-         colour_table_size = 2 << (flags & GIF_COLOUR_TABLE_SIZE_MASK);
-@@ -1115,14 +1106,6 @@
-                 }
-                 gif->frame_holders = 1;
- 
--                /* Initialise the bitmap header */
--                assert(gif->bitmap_callbacks.bitmap_create);
--                gif->frame_image = gif->bitmap_callbacks.bitmap_create(gif->width, gif->height);
--                if (gif->frame_image == NULL) {
--                        gif_finalise(gif);
--                        return GIF_INSUFFICIENT_MEMORY;
--                }
--
-                 /* Remember we've done this now */
-                 gif->buffer_position = gif_data - gif->gif_data;
-         }