diff --git a/docs/changelog.md b/docs/changelog.md
index d501190a..4a2a68ab 100644
--- a/docs/changelog.md
+++ b/docs/changelog.md
@@ -17,6 +17,9 @@ Requires libvips v8.13.0
 * Add support for WebP and PackBits `compression` options with TIFF output.
   [#3198](https://github.com/lovell/sharp/issues/3198)
 
+* Ensure OpenSlide and FITS input works with custom libvips.
+  [#3226](https://github.com/lovell/sharp/issues/3226)
+
 * Ensure `trim` operation is a no-op when it would reduce an image to nothing.
   [#3223](https://github.com/lovell/sharp/issues/3223)
 
diff --git a/src/common.cc b/src/common.cc
index 307549b3..924353c7 100644
--- a/src/common.cc
+++ b/src/common.cc
@@ -250,9 +250,9 @@ namespace sharp {
     { "VipsForeignLoadMagickBuffer", ImageType::MAGICK },
     { "VipsForeignLoadMagick7File", ImageType::MAGICK },
     { "VipsForeignLoadMagick7Buffer", ImageType::MAGICK },
-    { "VipsForeignLoadOpenslide", ImageType::OPENSLIDE },
+    { "VipsForeignLoadOpenslideFile", ImageType::OPENSLIDE },
     { "VipsForeignLoadPpmFile", ImageType::PPM },
-    { "VipsForeignLoadFits", ImageType::FITS },
+    { "VipsForeignLoadFitsFile", ImageType::FITS },
     { "VipsForeignLoadOpenexr", ImageType::EXR },
     { "VipsForeignLoadVips", ImageType::VIPS },
     { "VipsForeignLoadVipsFile", ImageType::VIPS },