Support PBM format

1 files changed, 3 insertions, 1 deletions

diff --git a/pnm.scm b/pnm.scm
index 04933c5..f4daeb7 100644
--- a/pnm.scm
+++ b/pnm.scm
@@ -17,7 +17,8 @@
 ;;; along with R7RS-PNM. If not, see <https://www.gnu.org/licenses/>.
 
 (define-library (pnm)
-  (export make-ppm-image
+  (export make-pbm-image
+          make-ppm-image
           make-pgm-image
           image?
           image-type
@@ -30,6 +31,7 @@
           image-write)
   (import (scheme base)
           (pnm image)
+          (pnm pbm)
           (pnm pgm)
           (pnm ppm)
           (pnm read)