diff --git a/extra/dosfstools/build b/extra/dosfstools/build
index 88d9d4c4..efcf47c7 100755
--- a/extra/dosfstools/build
+++ b/extra/dosfstools/build
@@ -1,5 +1,9 @@
 #!/bin/sh -e
 
+# Disable documentation (READMEs and such).
+sed 's/^\(dist_doc_DATA\)/\1_null/' Makefile.in > _
+mv -f _ Makefile.in
+
 ./configure \
     --prefix=/usr \
     --sbindir=/usr/bin \