diff --git a/libvips/include/vips/foreign.h b/libvips/include/vips/foreign.h
index ac58f946..099a4a5f 100644
--- a/libvips/include/vips/foreign.h
+++ b/libvips/include/vips/foreign.h
@@ -491,7 +491,7 @@ typedef enum {
 } VipsForeignTiffCompression;
 
 /**
- * VipsForeignTiffPoor:
+ * VipsForeignTiffPredictor:
  * @VIPS_FOREIGN_TIFF_PREDICTOR_NONE: no prediction
  * @VIPS_FOREIGN_TIFF_PREDICTOR_HORIZONTAL: horizontal differencing
  * @VIPS_FOREIGN_TIFF_PREDICTOR_FLOAT: float predictor
@@ -614,20 +614,20 @@ int vips_pngsave_buffer( VipsImage *in, void **buf, size_t *len, ... )
 
 /**
  * VipsForeignPpmFormat:
- * @VIPS_FOREIGN_PPM_PBM: portable bitmap
- * @VIPS_FOREIGN_PPM_PGM: portable greymap 
- * @VIPS_FOREIGN_PPM_PPM: portable pixmap
- * @VIPS_FOREIGN_PPM_PFM: portable float map
+ * @VIPS_FOREIGN_PPM_FORMAT_PBM: portable bitmap
+ * @VIPS_FOREIGN_PPM_FORMAT_PGM: portable greymap
+ * @VIPS_FOREIGN_PPM_FORMAT_PPM: portable pixmap
+ * @VIPS_FOREIGN_PPM_FORMAT_PFM: portable float map
  *
  * The netpbm file format to save as.
  *
- * #VIPS_FOREIGN_PPM_PBM images are single bit.
+ * #VIPS_FOREIGN_PPM_FORMAT_PBM images are single bit.
  *
- * #VIPS_FOREIGN_PPM_PGB images are 8, 16, or 32-bits, one band.
+ * #VIPS_FOREIGN_PPM_FORMAT_PGM images are 8, 16, or 32-bits, one band.
  *
- * #VIPS_FOREIGN_PPM_PPM images are 8, 16, or 32-bits, three bands.
+ * #VIPS_FOREIGN_PPM_FORMAT_PPM images are 8, 16, or 32-bits, three bands.
  *
- * #VIPS_FOREIGN_PPM_PFM images are 32-bit float pixels.
+ * #VIPS_FOREIGN_PPM_FORMAT_PFM images are 32-bit float pixels.
  */
 typedef enum {
 	VIPS_FOREIGN_PPM_FORMAT_PBM,
diff --git a/libvips/resample/reduce.c b/libvips/resample/reduce.c
index c5e1bed4..8f73a2db 100644
--- a/libvips/resample/reduce.c
+++ b/libvips/resample/reduce.c
@@ -61,6 +61,7 @@
  * @VIPS_KERNEL_NEAREST: The nearest pixel to the point.
  * @VIPS_KERNEL_LINEAR: Convolve with a triangle filter. 
  * @VIPS_KERNEL_CUBIC: Convolve with a cubic filter. 
+ * @VIPS_KERNEL_MITCHELL: Convolve with a Mitchell kernel.
  * @VIPS_KERNEL_LANCZOS2: Convolve with a two-lobe Lanczos kernel.
  * @VIPS_KERNEL_LANCZOS3: Convolve with a three-lobe Lanczos kernel.
  *