diff --git a/.travis.yml b/.travis.yml
index 50c2b9f9..9d8a47f0 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -5,7 +5,7 @@ before_script:
     --disable-dependency-tracking
     --with-jpeg-includes=$JPEG/include
     --with-jpeg-libraries=$JPEG/lib
-  - make -j$JOBS -s V=0
+  - make -j$JOBS -s 
 script:
   - make -Ctest -j$JOBS -s V=0 VERBOSE=1 check
 
@@ -72,7 +72,7 @@ matrix:
         - brew install --ignore-dependencies gtk-doc
         - brew install
           gobject-introspection
-          expat fftw mozjpeg libexif
+          fftw mozjpeg libexif
           libpng webp 
           swig imagemagick
           cfitsio libmatio
diff --git a/libvips/iofuncs/header.c b/libvips/iofuncs/header.c
index 57a42d81..eb406475 100644
--- a/libvips/iofuncs/header.c
+++ b/libvips/iofuncs/header.c
@@ -416,7 +416,7 @@ vips_image_guess_format( const VipsImage *image )
 
 	/* Stop a compiler warning.
 	 */
-	format = VIPS_INTERPRETATION_MULTIBAND; 
+	format = VIPS_FORMAT_UCHAR; 
 
 	switch( image->Type ) {
 	case VIPS_INTERPRETATION_B_W: