diff --git a/configure.ac b/configure.ac
index 390b8798..174b61e9 100644
--- a/configure.ac
+++ b/configure.ac
@@ -113,6 +113,7 @@ headers="\
 	convolution.h \
 	draw.h \
 	morphology.h \
+	mosaicing.h \
 	type.h \
 	rect.h \
 	resample.h \
diff --git a/libvips/mosaicing/global_balance.c b/libvips/mosaicing/global_balance.c
index 053330b1..4b2ba12d 100644
--- a/libvips/mosaicing/global_balance.c
+++ b/libvips/mosaicing/global_balance.c
@@ -1802,9 +1802,9 @@ vips_globalbalance_init( VipsGlobalbalance *globalbalance )
 }
 
 /**
- * vips_globalbalance:
+ * vips_globalbalance: (method)
  * @in: mosaic to rebuild
- * @out: output image
+ * @out: (out): output image
  * @...: %NULL-terminated list of optional named arguments
  * 
  * Optional arguments:
diff --git a/libvips/mosaicing/im_remosaic.c b/libvips/mosaicing/im_remosaic.c
index 8d8729e0..c90db327 100644
--- a/libvips/mosaicing/im_remosaic.c
+++ b/libvips/mosaicing/im_remosaic.c
@@ -194,9 +194,9 @@ vips_remosaic_init( VipsRemosaic *remosaic )
 }
 
 /**
- * vips_remosaic:
+ * vips_remosaic: (method)
  * @in: mosaic to rebuild
- * @out: output image
+ * @out: (out): output image
  * @old_str: gamma of source images
  * @new_str: gamma of source images
  * @...: %NULL-terminated list of optional named arguments
diff --git a/libvips/mosaicing/match.c b/libvips/mosaicing/match.c
index 60b77594..77b142a4 100644
--- a/libvips/mosaicing/match.c
+++ b/libvips/mosaicing/match.c
@@ -315,7 +315,7 @@ vips_match_init( VipsMatch *match )
  * vips_match:
  * @ref: reference image
  * @sec: secondary image
- * @out: output image
+ * @out: (out): output image
  * @xr1: first reference tie-point
  * @yr1: first reference tie-point
  * @xs1: first secondary tie-point
diff --git a/libvips/mosaicing/merge.c b/libvips/mosaicing/merge.c
index d003deab..ad21e2e3 100644
--- a/libvips/mosaicing/merge.c
+++ b/libvips/mosaicing/merge.c
@@ -168,7 +168,7 @@ vips_merge_init( VipsMerge *merge )
  * vips_merge:
  * @ref: reference image
  * @sec: secondary image
- * @out: output image
+ * @out: (out): output image
  * @direction: horizontal or vertical merge
  * @dx: displacement of ref from sec
  * @dy: displacement of ref from sec
diff --git a/libvips/mosaicing/mosaic.c b/libvips/mosaicing/mosaic.c
index 629a1132..5ec010ef 100644
--- a/libvips/mosaicing/mosaic.c
+++ b/libvips/mosaicing/mosaic.c
@@ -314,7 +314,7 @@ vips_mosaic_init( VipsMosaic *mosaic )
  * vips_mosaic:
  * @ref: reference image
  * @sec: secondary image
- * @out: output image
+ * @out: (out): output image
  * @direction: horizontal or vertical join
  * @xref: position in reference image
  * @yref: position in reference image